AnswersMathematics for College Liberal Arts Sem 1 1207350 BCPS 2025-26Describing and Comparing Data with Dotplots and Stemplots

Describing and Comparing Data with Dotplots and Stemplots Answers

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1
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The side-by-side stemplot below displays the arm spans, in centimeters, for two classes.

Question illustration
A
The arm spans for Class A have more variability than the arm spans for Class B.
B
The arm spans for Class B have less variability than the arm spans for Class A.
C
The arm spans for Class A have less variability than the arm spans for Class B.
D
The arm spans for Class B have about the same variability as the arm spans for Class A.
2
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The dotplots below display the number of bite-size snacks that students in two statistic classes grabbed with one hand. Class A has 32 students and Class B has 34 students.Which statement best compares the variability of the number of snacks grabbed for Class A and Class B?

Question illustration
A
The number of snacks grabbed for Class A has less variability than the number of snacks grabbed for Class B.
B
The number of snacks grabbed for Class B has less variability than the number of snacks grabbed for Class A.
C
The number of snacks grabbed for Class A has more variability than the number of snacks grabbed for Class B.
D
The number of snacks grabbed for Class B has about the same variability as the number of snacks grabbed for Class A.
3

The dotplot below displays the number of math classes taken by a random sample of students at a high school.

Question illustration
A
The distribution of math classes is skewed left with a center around 4 classes.
B
The distribution of math classes is skewed left with a center between 3 and 4 classes.
C
The distribution of math classes is unimodal symmetric with a center around 4 classes.
D
The distribution of math classes is unimodal symmetric with a center between 3 and 4 classes.
4

The dotplots below display the scores for two classes on a 30-point statistics quiz. Class A has 26 students and Class B has 25 students.Which statement best compares the scores for Class A to Class B?

Question illustration
A
The median score for Class A is lower than Class B’s.
B
The median score for Class B is lower than Class A’s.
C
The median score for Class A is higher than Class B’s.
D
The median score for Class B is about the same as Class A’s.
5

The arm spans were measured, in centimeters, for 12 students. The results are shown below.148, 151, 154, 155, 160, 161, 162, 162, 167, 170, 171, 180A student used the data to create this stemplot.

Question illustration
A
No, the stems should not be split.
B
No, there should be another stem of 17.
C
Yes, this is an accurate display of the data.
D
No, there should be another stem of 17 and another stem of 18.
6

The stemplot below displays the arm spans, in centimeters, for 44 students.

Question illustration
A
41%
B
45%
C
55%
D
59%
7

The side-by-side stemplot below displays the arm spans, in centimeters, for two classes.

Question illustration
A
The proportion of arm spans that are longer than 170 cm is higher in Class B than in Class A.
B
The proportion of arm spans that are longer than 170 cm is higher in Class A than in Class B.
C
The proportion of arm spans that are longer than 170 cm is about the same for Class A and Class B.
D
The proportion of arm spans that are longer than 170 cm cannot be compared with the given information.
8

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

Question illustration
A
16%
B
25%
C
75%
D
84%
9

The dotplot below displays the difference in scores for 18 games between a high school soccer team and its opponent.

Question illustration
A
17%
B
28%
C
72%
D
83%
10

The dotplot below displays the difference in scores for 18 games between a high school soccer team and its opponent.

Question illustration
A
A
B
B
C
C
D
D
11

The dotplots below display the number of bite-size snacks that students in two statistic classes grabbed with one hand. Class A has 32 students and Class B has 34 students.Which statement is NOT true?

Question illustration
A
Both distributions are skewed to the right.
B
There appear to be outliers in both distributions.
C
The proportion of students who grabbed more than 20 snacks is higher in Class A than in Class B.
D
The proportion of students who grabbed fewer than 25 snacks is higher in Class A than in Class B.
12

Thirty-four high school students were surveyed and asked how many siblings they have. The dotplot below displays the distribution of responses.

Question illustration
A
skewed to the left
B
bimodal symmetric
C
skewed to the right
D
unimodal symmetric
13

The dotplot below displays the difference in scores for 18 games between a high school soccer team and its opponent.

Question illustration
A
In one game, the team beat the opponent by 1 goal.
B
In two games, the team beat the opponent by 1 goal.
C
In one game, the team lost to the opponent by 1 goal.
D
In two games, the team lost to the opponent by 1 goal.

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