AnswersDRHS GA-Statistical ReasoningUnit Test

Unit Test — Unit test Answers

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The stemplot below represents the number of bite-size snacks grabbed by 37 students in an activity for a statistics class.

Question illustration
A
The distribution of the number of snacks grabbed is skewed right with a center around 18 and varies from 15 to 45. There are no outliers.
B
The distribution of the number of snacks grabbed is symmetric with a center around 18 and varies from 12 to 45. There are possible outliers at 38, 42, and 45.
C
The distribution of the number of snacks grabbed is skewed left with a center around 18 and varies from 12 to 45. There are possible outliers at 38, 42, and 45.
D
The distribution of the number of snacks grabbed is skewed right with a center around 18 and varies from 12 to 45. There are possible outliers at 38, 42, and 45.
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The bar graph below shows the eye colors of students in a statistics class.

Question illustration
A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
23

Thirteen students in a statistics class were asked how many siblings they have. Their responses are listed below.0, 1, 2, 3, 3, 3, 3, 3, 3, 3, 5, 5, 6Which of the following is the five-number summary for the data?

A
0, 3, 3, 3, 6
B
0, 3, 3, 4, 6
C
0, 2.5, 3, 3, 6
D
0, 2.5, 3, 4, 6
24

Alex records the running time—the number of minutes a movie lasts from start to finish—of 50 popular movies. The distribution of times, in minutes, is displayed in the histogram below.

Question illustration
A
uniform
B
skewed left
C
skewed right
D
roughly symmetric
25

The distribution of the salaries at a small business is strongly skewed with many people making very modest salaries and a few making very large salaries. Which measure of center, mean or median, is a better indication of a "typical” salary at this business?

A
The mean is better because it is not affected by the high salaries.
B
The median is better because it is not affected by the high salaries.
C
It cannot be determined without knowing the actual salaries.
D
Either one would be a good measure of a typical salary because they are the same value.

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