ASM 275 / ASM275 UNIT 1 LAB QUESTIONS AND ANSWERS Unit 1 - 2.
Q1
How can the boxes be observed as nominal data?
A
By color: Green, Orange, Blue
... [Show More] B
By order of size: Small, Medium, Large
C
By the lengths of one of the sides: 1cm, 2cm, 3cm Explanation
The answer is A, nominal refers to labels that cannot placed in order.
Q2
How can the boxes be observed as ordinal data?
A
By color: Green, Orange, Blue
B
By order of size: Small, Medium, Large C
By the lengths of one side of the squares: 1cm, 2cm, 3cm Explanation
The answer is B, ordinal scale data can be ordered.
Q3
How can the boxes be observed as ratio scale data?
A
By color: Green, Orange, Blue
B
By order of size: Small, Medium, Large
C
By the lengths of one side of the squares: 1cm, 2cm, 3cm
Explanation
The answer is C, the measurements in centimeters would be ratio scale.
Q4
Which of these is an example of INTERVAL scale data? Remember that interval scale data are continuous, however, a zero value does NOT indicate the absence of that condition.
A
Temperature as measured along the Kelvin scale
B
Age measured since the Big Bang
C
Measurement of elevation based on sea level D
Count of the number of fingers
Explanation
A sea level of 0 does not mean a lack of elevation or altitude (you are closer to the sun than the ocean bottom). And you can have negative measures of altitude based on sea level if you are under the ocean. Therefore, measurements of altitude or elevation based on sea level have an arbitrary 0 point and are interval in scale.
Q5
Consider the differences between the male and female pelvis as shown here. For a series of pelves (plural of pelvis) we would assign each to a category of 'male' or 'female'. How would the data (Male, Female) be categorized? [10]
A
Nominal B
Ordinal
C
Interval
D
Ratio Explanation
The answer is A. ‘Male’ and ‘Female’ are qualitative descriptions that cannot be placed in order or ranked along a scale.
Q6
What types of data are being generated in this image? Note the caliper read out is in millimeters. [11]
A
Nominal
B
Ordinal
C
Interval
D
Ratio
Explanation
The answer is D. These measurements are quantitative descriptions of data that can be placed in an order and ranked along a scale that has a 0 value.
Q7
The table on the left side is how we would record information on variation in mastoid size. What type of data is being depicted in this table?
A
Nominal
B
Ordinal C
Interval
D
Ratio Explanation
The answer is B. These are qualitative descriptions that can be placed in order or ranked along a scale; they are not just labels for variables.
Q8
Time since death is a critical concept that we discuss later in this unit. What kinds of data are depicted by the times listed in the table on the right? [13]
A
Nominal
B
Ordinal
C
Interval D
Ratio Explanation
The answer is C. Time is a quantitative variable that has no 0 value on this particular measurement scale (this is not a theoretical physics class).
Q9
Based on the previous definitions, which of the following data series represent continuous scale data? (select all applicable answers, there is more than one correct response).
Multiple answers: You can select more than one option
A
12 ft 9 ft 7 ft 3 ft B
red green yellow purple
C
male female female male female
D
12°C 7°C 32°C 18°C
Explanation
The answer is A and D. Both sets of data represent positions along continuous number lines.
Q10
Based on the previous definitions of variable types, which of the following data series represent discrete data?
A
red, green, yellow, purple B
8 cm, 11 cm, 2 cm, 5 cm
C
20 years old, 50 years old, 100 years old
D
1 inch, 4 inches, 10 inches, 16 inches Explanation
The answer is A. These data represent members of categories. This is a nominal variable.
Q11
The mode is relatively easy to calculate. Assuming a standard grading scale (A=90-100, B=80-90, C=70-79, D=60-69, E<60)) what is the mode of the
grades in the course, as depicted below?
A A B B C C D D E E
Explanation
The answer is C. C is the most common grade and is the mode of this sample.
Q12
Given the following data, what is the MEDIAN of the data set? DATA = 1, 2, 5, 4, 3, 1, 1
The answer is a whole number and no decimal places should be used.
Numeric Answer:
You are correct 2
Explanation
The median is 2, the middle value in this data series.
Q13
Given the following data (DATA = 1, 2, 5, 4, 3, 1, 1), what is the MEAN of the data set? (Note, please provide an answer to two decimal places x.xx)
DOUBLE CHECK YOUR ANSWER BEFORE SUBMITTING. YOU ONLY HAVE ONE CHANCE.
Numeric Answer: Correct Answer 2.43
Q1
A
the darts are accurate but not precise
B
The darts are precise but not accurate
C
The darts are both accurate and precise D
The darts are neither accurate nor precise
Q2
Consider the placement of the darts with respect to the bullseye (the true value). Are the darts accurate and precise? [3] Before answering please make sure to view the images for questions 1-4.
A
the darts are accurate but not precise B
The darts are precise but not accurate
C
The darts are both accurate and precise
D
The darts are neither accurate nor precise Explanation
The answer is A because even though the darts are all scattered with respect to the bullseye they do surround the target. So they are not precise but on average they do approximate the measurement.
Q3
Consider the placement of the darts with respect to the bullseye (the true value). Are the darts accurate and precise? [3] Before answering please make sure to view the images for questions 1-4.
A
the darts are accurate but not precise
B
The darts are precise but not accurate C
The darts are both accurate and precise
D
The darts are neither accurate nor precise
Q4
Consider the placement of the darts with respect to the bullseye (the true value). Are the darts accurate and precise? [3] Before answering please make sure to view the images for questions 1-4.
A
the darts are accurate but not precise
B
The darts are precise but not accurate
C
The darts are both accurate and precise
D
The darts are neither accurate nor precise
Explanation
The answer is D, neither precise nor accurate.
Q5
Here is a dartboard showing the bullseye (the target or true value) and the locations where the darts were thrown (yellow dots). The bottom image shows a normal distribution where the horizontal axis represents the measurement value on the dartboard and the vertical axis represents how common those values are. The vertical line labeled "Reference Value" is directly beneath the bullseye. This is our TRUE value that we are trying to accurately and precisely measure. The horizontal line A is the difference between the TRUE value and the MEASURED value and line B represents how spread out the darts are. In this diagram, lines A and B represent what? [4]
A
A = Accuracy, B = Precision B
A = Precision, B = Accuracy Explanation
The answer is A. The difference between the true and measured value is accuracy. In this example accuracy is poor.
Q6
Based on the above, which diagram represents a more precise measurement set? [4] [Show Less]