Question: A company has developed a wristband for monitoring blood sugar levels without requiring direct blood samples. It is interested in demonstrating
... [Show More] the accuracy of the device for governmental approval and has decided to test the claim “The glucose level reported by the wristband is within 10%of a standard blood test result.” Which of the following data collection processes would be appropriate? Select only one answer choice.
Question: A farmer divided his piece of land into 4equivalent groups. The quality of the soil is the same across the 4 groups of land. He planted the same crop in all 4 groups of land and recorded the yield of the crop in all 4 groups for a 4 week period. Is the study observational or experimental? If it is an experiment, what is the controlled factor?
Question: To test the effectiveness of a drug proposed to relieve symptoms of headache, physicians included participants for a study. They gave the drug to one group and a drug with no therapeutic effect to another group. Which group receives the placebo?
Question: Matthew has created a survey to test whether or not gender has any effect on political party associations. What is the explanatory variable in this situation?
Question: Is the statement below true or false?
Continuous data are the type of quantitative data that is the result of measuring.
Question: A doctor notes her patient’s temperature in degrees Fahrenheit every hour to make sure the patient does not get a fever. What is the level of measurement of the data?
Question: Karen wants to estimate the mean number of siblings for each student in her school. She records the number of siblings for each of 200randomly selected students in the school. What is the sample?
Question: True or False? In reference to different sampling methods, systematic sampling includes the steps: divide the population into groups; use simple random sampling to identify a proportionate number of individuals from each group.
Question: While standing on a highway overpass, Jennifer wonders what proportion of the vehicles that pass on the highway below are trucks. The highway has 4lanes running in each direction. Jennifer is only interested in the proportion of vehicles that pass over the course of the hour that she spends there. Which of the following sampling methods would be best for Jennifer to employ?
Question: As a member of a marketing team, you have been tasked with determining the number of DVDs that people have rented over the past six months. You sample twenty adults and decide that the best display of data is a frequency table for grouped data. Construct this table using four classes.
Question: The values and relative frequencies for a set of data are shown below. Complete the cumulative relative frequency table.
Question: The histogram below displays the weights of rainbow trout (in pounds) caught by all visitors at a lake on a Saturday afternoon. According to this histogram, which range of weights (in pounds) contains the lowest frequency?
Question: Describe the shape of the given histogram.
Question: A set of data is … by the stem and leaf plot below.
Question: The bar graph below shows the number of boys and girls in different classes.
Question: The line graph shown below represents the number of TVs in a house by square footage (in hundreds of feet). According to the information above, which of the following is an appropriate analysis of square footage and TVs?
Question: Ashley is reviewing past monthly credit card statements. The statements are … in the relative frequency table below.
Question: What is the cumulativerelative frequency of credit card statements that are $1245 or less?
Question: The bar graph below shows the number of men and women in different clubs.
Question: An English professor asks her students who their favorite character is in the novel they are reading. What is the level of measurement of the data?
Question: Jessica is keeping track of her favorite stock’s price. The line graph below shows the data.
Question: A set of data is … by the stem and leaf plot below.
Question: Describe the shape of the given histogram.
Question: A data set is … in the frequency table below. Using the table, determine the number of occurrences of values greater than or equal to
Question: Give your answer as a single number. For example if you found the number of values was 23, you would enter 23.
Question: Timothy wants to estimate the mean number of siblings for each student in his school. He records the number of siblings for each of 75 randomly selected students in the school. What is the statistic?
Question: In a psychological study aimed at testing a drug that reduces anxiety, the researcher grouped the participants into 2groups and gave the anxiety-reduction pill to one group and an inert pill to another group. Which group receives the placebo?
. Question: Brayden tosses a coin 500 Of those 500times, he observes heads a total of 416 times. Calculations show that the probability of this occurring by chance is less than 0.01, assuming the coin is fair. Determine the meaning of the significance level.
2. Question: Suppose X∼N(11,0.5), and x=12. Find and interpret the z-score of the standardized normal random variable.
3. Question: A normal distribution is observed from the times to complete an obstacle course. The mean is 69seconds and the standard deviation is 6 Using the Empirical Rule, what is the probability that a randomly selected finishing time is greater than 87 seconds?……. Provide the final answer as a percent rounded to two decimal places.
4. Question: The dataset below represents bugs found by a software tester in her product during different phases of testing: 88, 84, 81, 94, 91, 98, 98, 200………… The measures of central tendency are given below:
Mean: 25; Median: 92.5; Mode: 98. Identify the outlier and the measure of central tendency that is affected by the outlier.
5. Question: The following data set represents the ages of all six grandchildren in a family……….. Find the variance for this data set of ages: 6, 3, 14, 11, 14, 6……. Round the final answer to one decimal place.
6. Question: The following data set represents the ages of all seven grandchildren in a family….. 4, 5, 11, 12, 11, 8, 5….. If the variance of the ages is 9.7, what is the standard deviation?…. Round the final answer to one decimal place.
7. Question: Given the following list of prices (in thousands of dollars) of randomly selected trucks at a car dealership, find the median……. 20,46,19,14,42,26,33
8. Question: Each person in a group shuffles a deck of cards and keeps selecting a card until a queen appears. Find the mode of the following number of cards drawn from a deck until a queen appears…… 3,12,3,11,5,5,3,10,12
9. Question: Given the following list of data, what is the five-number summary?
2, 2, 2, 3, 3, 4, 4, 5, 6, 10, 11, 11, 13, 13, 14
10. Question: The box-and-whisker plot shows the number of books read by history students during the last school year……….. A box and whisker plot with minimum 4, first quartile 6, median 8, third quartile 10, and maximum 15……What is the range of the data?
11. Question: The five number summary for a set of data is given below.
Min Q1 Median Q3 Max
61 69 72 79 86
Using the interquartile range, which of the following are outliers? Select all correct answers.
12. Question: Alice sells boxes of candy at the baseball game and wants to know the mean number of boxes she sells. The numbers for the games so far are listed below…. 16,14,14,21,15….. Find the mean boxes sold.
13. Question: Given the following list of the number of voicemails each employee received at an office during the last workday, find the median…… 11,4,21,8,7,2,3,17,26,4,6
14. Question: Fill in the following contingency table and find the number of students who both go to the beach AND go to the mountains…….
15. Question: Which of the data sets represented by the following box and whisker plots has the smallest standard deviation?….. Four horizontal box-and-whisker plots share a vertical axis with the classes D, C, B, and A and a horizontal axis from 0 to 120 in increments of 20. The box-and-whisker plot above the class label A has the following five-number summary: 44, 69, 77, 82, and 112. The box-and-whisker plot above the class label B has the following five-number summary: 19, 64, 78, 87, and 121. The box-and-whisker plot above the class label C has the following five-number summary: 60, 72, 75, 80, and 92. The box-and-whisker plot above the class label D has the following five-number summary: 2, 63, 77, 92, and 138. All values are approximate.
16. Question: Researchers want to study whether or not a fear of flying is … to a fear of heights. They surveyed a large group of people and asked them whether or not they had a fear of flying and whether or not they had a fear of heights. The data are … in the contingency table below. What is the relative risk of being afraid of heights for those who are afraid of flying? Round your answer to two decimal places……. Afraid of flyingNot afraid of flyingTotalAfraid of heights7682158Not afraid of heights33370403Total109452561
17. Question: Diana is packing a lunch that will include an orange. Diana has 3navel oranges, 5 mandarin oranges, and 4 Valencia oranges. If Diana selects an orange at random, what is the probability that she selects a navel orange?…… Give your answer as a fraction.
18. Question: A spinner contains the numbers 1through 80. What is the probability that the spinner will land on a number that is not a multiple of 11?…… Give your answer in fraction form.
19. Question: A student wants to know his average homework grade for the first half of his math class. There were 7homeworks in the first half of the class, and his grades out of 100 are given by…… 100,90,95,89,92,85,95.
What is the population mean of his homework grades? Round your answer to the nearest tenth.
20. Question: Is the statement below true or false?…… Independent is the property of two events in which the knowledge that one of the events occurred does not affect the chance the other occurs.
21. Question: A group of 140students at an elementary school were asked if they prefer the color orange to the color green. The results are shown in the table below. Given that a randomly selected survey participant is a male, what is the probability that this student prefers the color green?
22. Question: Given the following histogram, decide if the data is skewed or symmetrical……. A bar graph has a horizontal axis titled Values labeled from 2 to 18 in increments of 2 and a vertical axis titled Frequency labeled from 0 to 200 in increments of 50. 14 bars are … above the numbers 2 to 16. From left to right, the heights of the bars are as follows: 1. 5. 10. 40, 75, 125, 190, 180, 130, 125, 60, 25,20, 10. All values are approximate.
23. Question: Of the following pairs of events, which pair has mutually exclusive events?
24. Question: The graph below shows the graphs of several normal distributions, labeled A, B, and C, on the same axis. Determine which normal distribution has the smallest standard deviation……. A figure consists of three curves along a horizontal axis, labeled Upper A, Upper B and Upper C. Curve Upper A is short and the most spread out, curve Upper B is tall and the least spread out, and curve C is farther to the left than A.
25. Question: A magician appears to be using a biased coin during one of their magic tricks. To find out whether this is true, the alleged unfair coin is flipped twice. The tree diagram below shows the probabilities of the different outcomes…… A tree diagram has a root that splits into 2 branches representing the outcomes of an event labeled Upper H and Upper T with probabilities StartFraction 3 Over 8 EndFraction and StartFraction 5 Over 8 EndFraction respectively. Each primary branch splits into 2 secondary branches, labeled Upper H and Upper T. The secondary branches have the following probabilities, with the primary and secondary branches listed first and the probability listed second: Upper H Upper H, StartFraction 3 Over 8 EndFraction; Upper H Upper T, StartFraction 5 Over 8 EndFraction; Upper T Upper H, StartFraction 3 Over 8 EndFraction; Upper T Upper T, StartFraction 5 Over 8 EndFraction…… Use the diagram to find the probability of getting one head and one tail (in either order)……. Provide the final answer as a fraction.
Further Additional Questions & Answers (from Different Quiz/Test Attempts)
1. Question: A deck of cards contains red cards numbered 1,2,3,4,5,6,7,8,9, blue cards numbered 1,2,3,4and green cards numbered 1,2,3,4,5,6,7,8,9,10. If a single card is picked at random, what is the probability that the card is green?
2. Question: The five-number summary for a set of data is given below.
Min Q1 Median Q3 Max
49 55 59 67 72
What is the interquartile range of the set of data?
3. Question: The five-number summary for a set of data is given below.
Min Q1 Median Q3 Max
43 51 53 58 94
What is the interquartile range of the set of data?
4. Question: The following frequency table summarizes a set of data. What is the five-number summary?
5. Question: Find the mode of the following amounts (in thousands of dollars) in savings accounts of randomly selected people aged 25-30.
8,6,8,7,2,2,2,4,4,4,4,7
6. Question: A deck of cards contains red cards numbered 1,2,3, blue cards numbered 1,2,3,4and green cards numbered 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16. If a single card is picked at random, what is the probability that the card is blue? Give your answer as a fraction.
7. Question: The five-number summary for a set of data is given below.
Min Q1 Median Q3 Max
57 61 67 71 98
What is the interquartile range of the set of data?
8. Question: The five-number summary for a set of data is given below.
Min Q1 Median Q3 Max
60 67 70 78 93
What is the interquartile range of the set of data?
9. Question: The following frequency table summarizes a set of data. What is the five-number summary?
Value Frequency
1 6
2 2
5 1
6 1
9 1
11 1
13 1
14 6
15 3
16 1
19 1
23 1
24 1
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