CHAPTER 2—DESCRIPTIVE STATISTICS: TABULAR AND GRAPHICALPRESENTATIONA frequency distribution is a tabular summary of data showing the a. fraction of
... [Show More] items in several classes b. percentage of items in several classes c. relative percentage of items in several classes d. number of items in several classes ANS: D PTS: 1 TOP: Descriptive Statistics 2. A frequency distribution is a. a tabular summary of a set of data showing the relative frequency b. a graphical form of representing data c. a tabular summary of a set of data showing the frequency of items in each of several nonoverlapping classes d. a graphical device for presenting categorical data ANS: C PTS: 1 TOP: Descriptive StatisticsFull file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson CHAPTER 2—DESCRIPTIVE STATISTICS: TABULAR AND GRAPHICAL PRESENTATIONS MULTIPLE CHOICE 1. A frequency distribution is a tabular summary of data showing the a. fraction of items in several classes b. percentage of items in several classes c. relative percentage of items in several classes d. number of items in several classes ANS: D PTS: 1 TOP: Descriptive Statistics 2. A frequency distribution is a. a tabular summary of a set of data showing the relative frequency b. a graphical form of representing data c. a tabular summary of a set of data showing the frequency of items in each of several nonoverlapping classes d. a graphical device for presenting categorical data ANS: C PTS: 1 TOP: Descriptive Statistics 3. A tabular summary of a set of data showing the fraction of the total number of items in several classes is a a. frequency distribution b. relative frequency distribution c. frequency d. cumulative frequency distribution ANS: B PTS: 1 TOP: Descriptive Statistics 4. The relative frequency of a class is computed by a. dividing the midpoint of the class by the sample size b. dividing the frequency of the class by the midpoint c. dividing the sample size by the frequency of the class d. dividing the frequency of the class by the sample size ANS: D PTS: 1 TOP: Descriptive Statistics 5. The percent frequency of a class is computed by a. multiplying the relative frequency by 10 b. dividing the relative frequency by 100 c. multiplying the relative frequency by 100 d. adding 100 to the relative frequency ANS: C PTS: 1 TOP: Descriptive Statistics 6. The sum of frequencies for all classes will always equal a. 1 b. the number of elements in a data set c. the number of classes d. a value between 0 and 1 Contact: [email protected] Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson ANS: B PTS: 1 TOP: Descriptive Statistics 7. Fifteen percent of the students in a school of Business Administration are majoring in Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The graphical device(s) which can be used to present these data is (are) a. a line chart b. only a bar chart c. only a pie chart d. both a bar chart and a pie chart ANS: D PTS: 1 TOP: Descriptive Statistics 8. A researcher is gathering data from four geographical areas designated: South = 1; North = 2; East = 3; West = 4. The designated geographical regions represent a. categorical data b. quantitative data c. label data d. either quantitative or categorical data ANS: A PTS: 1 TOP: Descriptive Statistics 9. Categorical data can be graphically represented by using a(n) a. histogram b. frequency polygon c. ogive d. bar chart ANS: D PTS: 1 TOP: Descriptive Statistics 10. A cumulative relative frequency distribution shows a. the proportion of data items with values less than or equal to the upper limit of each class b. the proportion of data items with values less than or equal to the lower limit of each class c. the percentage of data items with values less than or equal to the upper limit of each class d. the percentage of data items with values less than or equal to the lower limit of each class ANS: A PTS: 1 TOP: Descriptive Statistics 11. If several frequency distributions are constructed from the same data set, the distribution with the widest class width will have the a. fewest classes b. most classes c. same number of classes as the other distributions since all are constructed from the same data ANS: A PTS: 1 TOP: Descriptive Statistics 12. The sum of the relative frequencies for all classes will always equal a. the sample size b. the number of classes c. one d. any value larger than one ANS: C PTS: 1 TOP: Descriptive Statistics 13. The sum of the percent frequencies for all classes will always equal Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson a. one b. the number of classes c. the number of items in the study d. 100 ANS: D PTS: 1 TOP: Descriptive Statistics 14. The most common graphical presentation of quantitative data is a a. histogram b. bar chart c. relative frequency d. pie chart ANS: A PTS: 1 TOP: Descriptive Statistics 15. The total number of data items with a value less than the upper limit for the class is given by the a. frequency distribution b. relative frequency distribution c. cumulative frequency distribution d. cumulative relative frequency distribution ANS: C PTS: 1 TOP: Descriptive Statistics 16. The relative frequency of a class is computed by a. dividing the cumulative frequency of the class by n b. dividing n by cumulative frequency of the class c. dividing the frequency of the class by n d. dividing the frequency of the class by the number of classes ANS: C PTS: 1 TOP: Descriptive Statistics 17. In constructing a frequency distribution, the approximate class width is computed as a. (largest data value - smallest data value)/number of classes b. (largest data value - smallest data value)/sample size c. (smallest data value - largest data value)/sample size d. largest data value/number of classes ANS: A PTS: 1 TOP: Descriptive Statistics 18. In constructing a frequency distribution, as the number of classes are decreased, the class width a. decreases b. remains unchanged c. increases d. can increase or decrease depending on the data values ANS: C PTS: 1 TOP: Descriptive Statistics 19. The difference between the lower class limits of adjacent classes provides the a. number of classes b. class limits c. class midpoint d. class width ANS: D PTS: 1 TOP: Descriptive Statistics Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson 20. In a cumulative frequency distribution, the last class will always have a cumulative frequency equal to a. one b. 100% c. the total number of elements in the data set d. None of these alternatives is correct. ANS: C PTS: 1 TOP: Descriptive Statistics 21. In a cumulative relative frequency distribution, the last class will have a cumulative relative frequency equal to a. one b. zero c. the total number of elements in the data set d. None of these alternatives is correct. ANS: A PTS: 1 TOP: Descriptive Statistics 22. In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to a. one b. 100 c. the total number of elements in the data set d. None of these alternatives is correct. ANS: B PTS: 1 TOP: Descriptive Statistics 23. Data that provide labels or names for categories of like items are known as a. categorical data b. quantitative data c. label data d. category data ANS: A PTS: 1 TOP: Descriptive Statistics 24. A tabular method that can be used to summarize the data on two variables simultaneously is called a. simultaneous equations b. crosstabulation c. a histogram d. an ogive ANS: B PTS: 1 TOP: Descriptive Statistics 25. A graphical presentation of the relationship between two variables is a. an ogive b. a histogram c. either an ogive or a histogram, depending on the type of data d. a scatter diagram ANS: D PTS: 1 TOP: Descriptive Statistics 26. A histogram is said to be skewed to the left if it has a a. longer tail to the right b. shorter tail to the right c. shorter tail to the left d. longer tail to the left Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson ANS: D PTS: 1 TOP: Descriptive Statistics 27. When a histogram has a longer tail to the right, it is said to be a. symmetrical b. skewed to the left c. skewed to the right d. None of these alternatives is correct. ANS: C PTS: 1 TOP: Descriptive Statistics 28. In a scatter diagram, a line that provides an approximation of the relationship between the variables is known as a. approximation line b. trend line c. line of zero intercept d. line of zero slope ANS: B PTS: 1 TOP: Descriptive Statistics 29. A histogram is a. a graphical presentation of a frequency or relative frequency distribution b. a graphical method of presenting a cumulative frequency or a cumulative relative frequency distribution c. the history of data elements d. the same as a pie chart ANS: A PTS: 1 TOP: Descriptive Statistics 30. A situation in which conclusions based upon aggregated crosstabulation are different from unaggregated crosstabulation is known as a. wrong crosstabulation b. Simpson's rule c. Simpson's paradox d. aggregated crosstabulation ANS: C PTS: 1 TOP: Descriptive Statistics NARRBEGIN: Exhibit 02-01 Exhibit 2-1 The numbers of hours worked (per week) by 400 statistics students are shown below. Number of hours Frequency 0 - 9 20 10 - 19 80 20 - 29 200 30 - 39 100 NARREND 31. Refer to Exhibit 2-1. The class width for this distribution a. is 9 b. is 10 c. is 39, which is: the largest value minus the smallest value or 39 - 0 = 39 Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson d. varies from class to class ANS: B PTS: 1 TOP: Descriptive Statistics 32. Refer to Exhibit 2-1. The number of students working 19 hours or less a. is 80 b. is 100 c. is 180 d. is 300 ANS: B PTS: 1 TOP: Descriptive Statistics 33. Refer to Exhibit 2-1. The relative frequency of students working 9 hours or less a. is 20 b. is 100 c. is 0.95 d. 0.05 ANS: D PTS: 1 TOP: Descriptive Statistics 34. Refer to Exhibit 2-1. The percentage of students working 19 hours or less is a. 20% b. 25% c. 75% d. 80% ANS: B PTS: 1 TOP: Descriptive Statistics 35. Refer to Exhibit 2-1. The cumulative relative frequency for the class of 20 - 29 a. is 300 b. is 0.25 c. is 0.75 d. is 0.5 ANS: C PTS: 1 TOP: Descriptive Statistics 36. Refer to Exhibit 2-1. The cumulative percent frequency for the class of 30 - 39 is a. 100% b. 75% c. 50% d. 25% ANS: A PTS: 1 TOP: Descriptive Statistics 37. Refer to Exhibit 2-1. The cumulative frequency for the class of 20 - 29 a. is 200 b. is 300 c. is 0.75 d. is 0.5 ANS: B PTS: 1 TOP: Descriptive Statistics 38. Refer to Exhibit 2-1. If a cumulative frequency distribution is developed for the above data, the last class will have a cumulative frequency of a. 100 Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson b. 1 c. 30 - 39 d. 400 ANS: D PTS: 1 TOP: Descriptive Statistics 39. Refer to Exhibit 2-1. The percentage of students who work at least 10 hours per week is a. 50% b. 5% c. 95% d. 100% ANS: C PTS: 1 TOP: Descriptive Statistics 40. Refer to Exhibit 2-1. The number of students who work 19 hours or less is a. 80 b. 100 c. 200 d. 400 ANS: B PTS: 1 TOP: Descriptive Statistics 41. Refer to Exhibit 2-1. The midpoint of the last class is a. 50 b. 34 c. 35 d. 34.5 ANS: D PTS: 1 TOP: Descriptive Statistics NARRBEGIN: Exhibit 02-02 Exhibit 2-2 A survey of 800 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school. Undergraduate Major Graduate School Business Engineering Others Total Yes 70 84 126 280 No 182 208 130 520 Total 252 292 256 800 NARREND 42. Refer to Exhibit 2-2. What percentage of the students does not plan to go to graduate school? a. 280 b. 520 c. 65 d. 32 ANS: C PTS: 1 TOP: Descriptive Statistics 43. Refer to Exhibit 2-2. What percentage of the students' undergraduate major is engineering? a. 292 b. 520 Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson c. 65 d. 36.5 ANS: D PTS: 1 TOP: Descriptive Statistics 44. Refer to Exhibit 2-2. Of those students who are majoring in business, what percentage plans to go to graduate school? a. 27.78 b. 8.75 c. 70 d. 72.22 ANS: A PTS: 1 TOP: Descriptive Statistics 45. Refer to Exhibit 2-2. Among the students who plan to go to graduate school, what percentage indicated "Other" majors? a. 15.75 b. 45 c. 54 d. 35 ANS: B PTS: 1 TOP: Descriptive Statistics NARRBEGIN: Exhibit 2-3 Exhibit 2-3 Michael's Compute-All, a national computer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below: Number of Laptops Sold Number of Days 0 - 19 5 20 - 39 15 40 - 59 30 60 - 79 20 80 - 99 10 Total 80 NARREND 46. Refer to Exhibit 2-3. The class width of the above distribution is a. 0 to 100 b. 20 c. 80 d. 5 ANS: B PTS: 1 TOP: Descriptive Statistics 47. Refer to Exhibit 2-3. The lower limit of the first class is a. 5 b. 80 c. 0 d. 20 ANS: C PTS: 1 TOP: Descriptive Statistics Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson 48. Refer to Exhibit 2-3. If one develops a cumulative frequency distribution for the above data, the last class will have a frequency of a. 10 b. 100 c. 0 to 100 d. 80 ANS: D PTS: 1 TOP: Descriptive Statistics 49. Refer to Exhibit 2-3. The percentage of days in which the company sold at least 40 laptops is a. 37.5% b. 62.5% c. 90.0% d. 75.0% ANS: D PTS: 1 TOP: Descriptive Statistics 50. Refer to Exhibit 2-3. The number of days in which the company sold less than 60 laptops is a. 20 b. 30 c. 50 d. 60 ANS: C PTS: 1 TOP: Descriptive Statistics PROBLEM 1. Thirty students in the School of Business were asked what their majors were. The following represents their responses (M = Management; A = Accounting; E = Economics; O = Others). A M M A M M E M O A E E M A O E M A M A M A O A M E E M A M a. Construct a frequency distribution and a bar chart. b. Construct a relative frequency distribution and a pie chart. ANS: (a) (b) Major Frequency Relative Frequency M 12 0.4 A 9 0.3 E 6 0.2 O 3 0.1 Total 30 1.0 Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson PTS: 1 TOP: Descriptive Statistics 2. Twenty employees of the Ahmadi Corporation were asked if they liked or disliked the new district manager. Below you are given their responses. Let L represent liked and D represent disliked. L L D L D D D L L D D L D D L D D L D L a. Construct a frequency distribution and a bar chart. b. Construct a relative frequency distribution and a pie chart. ANS: a and b Preferences Frequency Relative Frequency L 9 0.45 D 11 0.55 Total 20 1.00 Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson PTS: 1 TOP: Descriptive Statistics 3. Forty shoppers were asked if they preferred the weight of a can of soup to be 6 ounces, 8 ounces, or 10 ounces. Below you are given their responses. 6 6 6 10 8 8 8 10 6 6 10 10 8 8 6 6 6 8 6 6 8 8 8 10 8 8 6 10 8 6 6 8 8 8 10 10 8 10 8 6 a. Construct a frequency distribution and graphically represent the frequency distribution. b. Construct a relative frequency distribution and graphically represent the relative frequency distribution. ANS: a and b Preferences Frequency Relative Frequency 6 ounces 14 0.350 8 ounces 17 0.425 10 ounces 9 0.225 Total 40 1.000 Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson PTS: 1 TOP: Descriptive Statistics 4. A student has completed 20 courses in the School of Arts and Sciences. Her grades in the 20 courses are shown below. A B A B C C C B B B B A B B B C B C B A a. Develop a frequency distribution and a bar chart for her grades. b. Develop a relative frequency distribution for her grades and construct a pie chart. ANS: a and b Grade Frequency Relative Frequency A 4 0.20 B 11 0.55 C 5 0.25 Total 20 1.00 Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson PTS: 1 TOP: Descriptive Statistics 5. A sample of 50 TV viewers were asked, "Should TV sponsors pull their sponsorship from programs that draw numerous viewer complaints?" Below are the results of the survey. (Y = Yes; N = No; W = Without Opinion) N W N N Y N N N Y N N Y N N N N N Y N N Y N Y W N Y W W N Y W W N W Y W N W Y W N Y N Y N W Y Y N Y a. Construct a frequency distribution and a bar chart. b. Construct a relative frequency distribution and a pie chart. ANS: a and b Frequency Relative Frequency No 24 0.48 Yes 15 0.30 Without Opinion 11 0.22 Total 50 1.00 Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson PTS: 1 TOP: Descriptive Statistics 6. Below you are given the examination scores of 20 students. 52 99 92 86 84 63 72 76 95 88 92 58 65 79 80 90 75 74 56 99 a. Construct a frequency distribution for this data. Let the first class be 50 - 59 and draw a histogram. b. Construct a cumulative frequency distribution. c. Construct a relative frequency distribution. d. Construct a cumulative relative frequency distribution. ANS: a. b. c. d. Cumulative Cumulative Relative Relative Score Frequency Frequency Frequency Frequency 50 - 59 3 3 0.15 0.15 60 - 69 2 5 0.10 0.25 70 - 79 5 10 0.25 0.50 80 - 89 4 14 0.20 0.70 90 - 99 6 20 0.30 1.00 Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson Total 20 1.00 PTS: 1 TOP: Descriptive Statistics 7. The frequency distribution below was constructed from data collected from a group of 25 students. Height (in Inches) Frequency 58 - 63 3 64 - 69 5 70 - 75 2 76 - 81 6 82 - 87 4 88 - 93 3 94 - 99 2 a. Construct a relative frequency distribution. b. Construct a cumulative frequency distribution. c. Construct a cumulative relative frequency distribution. ANS: a. b. c. Cumulative Height Relative Cumulative Relative (In Inches) Frequency Frequency Frequency Frequency 58 - 63 3 0.12 3 0.12 64 - 69 5 0.20 8 0.32 70 - 75 2 0.08 10 0.40 76 - 81 6 0.24 16 0.64 82 - 87 4 0.16 20 0.80 88 - 93 3 0.12 23 0.92 94 - 99 2 0.08 25 1.00 1.00 PTS: 1 TOP: Descriptive Statistics 8. The frequency distribution below was constructed from data collected on the quarts of soft drinks consumed per week by 20 students. Quarts of Soft Drink Frequency 0 - 3 4 4 - 7 5 8 - 11 6 12 - 15 3 16 - 19 2 a. Construct a relative frequency distribution. b. Construct a cumulative frequency distribution. c. Construct a cumulative relative frequency distribution. Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson ANS: a. b. c. Cumulative Quarts of Relative Cumulative Relative Soft Drinks Frequency Frequency Frequency Frequency 0 - 4 4 0.20 4 0.20 4 - 8 5 0.25 9 0.45 8 - 12 6 0.30 15 0.75 12 - 16 3 0.15 18 0.90 16 - 20 2 0.10 20 1.00 Total 20 1.00 PTS: 1 TOP: Descriptive Statistics 9. The grades of 10 students on their first management test are shown below. 94 61 96 66 92 68 75 85 84 78 a. Construct a frequency distribution. Let the first class be 60 - 69. b. Construct a cumulative frequency distribution. c. Construct a relative frequency distribution. ANS: a. b. c. Cumulative Relative Class Frequency Frequency Frequency 60 - 69 3 3 0.3 70 - 79 2 5 0.2 80 - 89 2 7 0.2 90 - 99 3 10 0.3 Total 10 1.0 PTS: 1 TOP: Descriptive Statistics 10. There are 800 students in the School of Business Administration. There are four majors in the School: Accounting, Finance, Management, and Marketing. The following shows the number of students in each major. Major Number of Students Accounting 240 Finance 160 Management 320 Marketing 80 Develop a percent frequency distribution and construct a bar chart and a pie chart. ANS: Major Percent Frequency Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson Accounting 30% Finance 20% Management 40% Marketing 10% PTS: 1 TOP: Descriptive Statistics 11. You are given the following data on the ages of employees at a company. Construct a stem-and-leaf display. 26 32 28 45 58 52 44 36 42 27 41 53 55 48 32 42 44 40 36 37 ANS: 2 | 6 7 8 3 | 2 2 6 6 7 4 | 0 1 2 2 4 4 5 8 5 | 2 3 5 8 PTS: 1 TOP: Descriptive Statistics Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson 12. Construct a stem-and-leaf display for the following data. 12 52 51 37 47 40 38 26 57 31 49 43 45 19 36 32 44 48 22 18 ANS: 1 | 2 8 9 2 | 2 6 3 | 1 2 6 7 8 4 | 0 3 4 5 7 8 9 5 | 1 2 7 PTS: 1 TOP: Descriptive Statistics 13. The SAT scores of a sample of business school students and their genders are shown below. SAT Scores Gender Less than 20 20 up to 25 25 and more Total Female 24 168 48 240 Male 40 96 24 160 Total 64 264 72 400 a. How many students scored less than 20? b. How many students were female? c. Of the male students, how many scored 25 or more? d. Compute row percentages and comment on any relationship that may exist between SAT scores and gender of the individuals. e. Compute column percentages. ANS: a. 64 b. 240 c. 24 d. SAT Scores Gender Less than 20 20 up to 25 25 and more Total Female 10% 70% 20% 100% Male 25% 60% 15% 100% From the above percentages it can be noted that the largest percentages of both genders' SAT scores are in the 20 to 25 range. However, 70% of females and only 60% of males have SAT scores in this range. Also it can be noted that 10% of females' SAT scores are under 20, whereas, 25% of males' SAT scores fall in this category. e. SAT Scores Gender Less than 20 20 up to 25 25 and more Female 37.5% 63.6% 66.7% Male 62.5% 36.4% 33.3% Total 100% 100% 100% Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson PTS: 1 TOP: Descriptive Statistics 14. For the following observations, plot a scatter diagram and indicate what kind of relationship (if any) exist between x and y. x y 2 7 6 19 3 9 5 17 4 11 ANS: A positive relationship between x and y appears to exist. PTS: 1 TOP: Descriptive Statistics 15. For the following observations, plot a scatter diagram and indicate what kind of relationship (if any) exist between x and y. x y 8 4 5 5 3 9 2 12 1 14 ANS: A negative relationship between x and y appears to exist. Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson PTS: 1 TOP: Descriptive Statistics 16. Five hundred recent graduates indicated their majors as follows. Major Frequency Accounting 60 Finance 100 Economics 40 Management 120 Marketing 80 Engineering 60 Computer Science 40 Total 500 a. Construct a relative frequency distribution. b. Construct a percent frequency distribution. ANS: a. b. Relative Percent Major Frequency Frequency Frequency Accounting 60 0.12 12 Finance 100 0.20 20 Economics 40 0.08 8 Management 120 0.24 24 Marketing 80 0.16 16 Engineering 60 0.12 12 Computer Science 40 0.08 8 Total 500 1.00 100 PTS: 1 TOP: Descriptive Statistics 17. A sample of the ages of 10 employees of a company is shown below. 20 30 40 30 50 Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson 30 20 30 20 40 Construct a dot plot for the above data. ANS: • • • • • • • • • • 10 20 30 40 50 60 PTS: 1 TOP: Descriptive Statistics 18. The following data set shows the number of hours of sick leave that some of the employees of Bastien's, Inc. have taken during the first quarter of the year (rounded to the nearest hour). 19 22 27 24 28 12 23 47 11 55 25 42 36 25 34 16 45 49 12 20 28 29 21 10 59 39 48 32 40 31 a. Develop a frequency distribution for the above data. (Let the width of your classes be 10 units and start your first class as 10 - 19.) b. Develop a relative frequency distribution and a percent frequency distribution for the data. c. Develop a cumulative frequency distribution. d. How many employees have taken less than 40 hours of sick leave? ANS: a. b. b. c. Hours of Relative Percent Cum. Sick Leave Taken Freq. Freq. Freq. Freq. 10 - 19 6 0.20 20 6 20 - 29 11 0.37 37 17 30 - 39 5 0.16 16 22 40 - 49 6 0.20 20 28 50 - 59 2 0.07 7 30 d. 22 PTS: 1 TOP: Descriptive Statistics 19. The sales record of a real estate company for the month of May shows the following house prices (rounded to the nearest $1,000). Values are in thousands of dollars. 105 55 45 85 75 30 60 75 79 95 a. Develop a frequency distribution and a percent frequency distribution for the house prices. (Use 5 classes and have your first class be 20 - 39.) b. Develop a cumulative frequency and a cumulative percent frequency distribution for the above data. Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson c. What percentage of the houses sold at a price below $80,000? ANS: a. a. b. b. Cum. Sales Price Percent Cum. Percent (In Thousands of Dollars) Freq. Freq. Freq. Freq. 20 - 39 1 10 1 10 40 - 59 2 20 3 30 60 - 79 4 40 7 70 80 - 99 2 20 9 90 100 - 119 1 10 10 100 c. 70% PTS: 1 TOP: Descriptive Statistics 20. The test scores of 14 individuals on their first statistics examination are shown below. 95 87 52 43 77 84 78 75 63 92 81 83 91 88 Construct a stem-and-leaf display for these data. ANS: 4 3 5 2 6 3 7 5 7 8 8 1 3 4 7 8 9 1 2 5 PTS: 1 TOP: Descriptive Statistics 21. A survey of 400 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school. Undergraduate Major Graduate School Business Engineering Others Total Yes 35 42 63 140 No 91 104 65 260 Total 126 146 128 400 a. Are a majority of the seniors in the survey planning to attend graduate school? b. Which discipline constitutes the majority of the individuals in the survey? c. Compute row percentages and comment on the relationship between the students' undergraduate major and their intention of attending graduate school. d. Compute the column percentages and comment on the relationship between the students' intention of going to graduate school and their undergraduate major. ANS: Full file at http://testbank360.eu/test-bank-statistics-for-business-and-economics-11th-edition-anderson a. No, majority (260) will not attend graduate school b. Majority (146) are engineering majors c. Undergraduate Major Graduate School Business Engineering Others Total Yes 25% 30% 45% 100% No 35% 40% 25% 100% Majority who plan to go to graduate school are from "Other" majors. Majority of those who will not go to graduate school are engineering majors. d. Undergraduate Major Graduate School Business Engineering Others Yes 27.8% 28.8% 49.2% No 72.2% 71.2% 50.8% Total 100% 100% 100% Approximately the same percentages of Business and engineering majors plan to attend graduate school (27.8% and 28.8% respectively). Of the "Other" majors approximately half (49.2%) plan to go to graduate school. PTS: 1 TOP: Descriptive Statistics [Show Less]