AnswersTN-Mathematical Reasoning for Decision Making SupplementComparing Two Categorical Variables

Measures of Center and Location Answers

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21
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The dotplot below displays 26 students’ scores on a 30-point statistics quiz.

Question illustration
A
The distribution of quiz scores is skewed left with a center around 24 and varies from 12 to 30. There are possible outliers at 12, 14, 15, and 16.
B
The distribution of quiz scores is skewed right with a center around 24 and varies from 12 to 30. There are possible outliers at 12, 14, 15, and 16.
C
The distribution of quiz scores is unimodal symmetric with a center around 24 and varies from 12 to 30. There are possible outliers at 12, 14, 15, and 16.
D
The distribution of quiz scores is unimodal symmetric with a center around 26 and varies from 20 to 30. There are possible outliers at 12, 14, 15, and 16.
22
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The relative frequency table displays the percentage of responses of students who were asked, "What caffeinated drinks do you consume?"CoffeeTeaSodaEnergy drink0.830.750.750.25The picture graph below displays the results of the survey.Is this graph misleading?

Question illustration
A
No, because the pictures accurately represent the percentage of each type of drink.
B
No, because the height of each picture corresponds to the percentage of each type of drink.
C
Yes, because the height of each picture does not correspond to the percentage of each type of drink.
D
Yes, because the areas of the pictures do not accurately represent the proportions of each type of drink.
23

Some students were surveyed about their favorite type music and favorite school subject. The results are displayed below.Based on the graph, is there an association between favorite type of music and favorite school subject?

Question illustration
A
There is an association because the distribution of favorite music differs among the subject groups.
B
There is an association because the distribution of favorite music is the same among the subject groups.
C
There is no association because the distribution of favorite music differs among the subject groups.
D
There is no association because the distribution of favorite music is the same among the subject groups.
24

The stemplot below represents the number of bite-size snacks grabbed by 32 students in an activity for a statistics class.

Question illustration
A
skewed to the left
B
bimodal symmetric
C
skewed to the right
D
unimodal symmetric
25

The bar graph below displays students’ responses to the question "What caffeinated drinks do you consume?”

Question illustration
A
Yes, because the data are grouped into categories.
B
Yes, because the data can be represented by a relative frequency compared to the whole.
C
No, because the data add up to more than 100%.
D
No, because the data categories are too broad.

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