Analyzing Dot Plots

Question 1

Walter’s history test scores and Janine’s history test scores are shown on the dot plots below.Walter’s History Test ScoresJanine’s History Test ScoresIf each student gets 65 on the next test, which explains the measure of center that would be most affected?

Revolt · Accepted Answer

Their means will be most affected because this value will be an outlier.

Question 2

The students in Class A and Class B were asked how many pets they each have. The dot plots below show the results.Students in Class A Students in Class BWhat is the difference between the ranges in the dot plots?

Revolt · Accepted Answer

2

Question 3

The dot plots below show rainfall totals in the Highlands and Lowlands areas of a certain region.Which statement comparing the shapes of the dot plots is true?

Revolt · Accepted Answer

The Highlands data points are evenly distributed around the center, while the Lowlands data points are clustered toward the left of the plot.

Question 4

The dot plots below show the test scores of the seventh-grade students and the fifth-grade students at a local school.Seventh-Grade and Fifth-Grade Students’ Test ScoresWhich statement compares the shape of the dot plots?

Revolt · Accepted Answer

Only the fifth-grade data points are distributed fairly evenly.

Question 5

The students in Mr. McIntyre’s class and the students in Mrs. Ramos’s class were asked how many pets they each have. The dot plots below show the results.Mr. McIntyre’s ClassMrs. Ramos’s ClassWhich statement correctly compares the means of the data in the dot plots?

Revolt · Accepted Answer

The mean for Mrs. Ramos’s class is about 2 more than the mean for Mr. McIntyre’s class.

Question 6

The amount that two groups of students spent on snacks in one day is shown in the dot plots below.Group AGroup BWhen looking at the differences in the statistical measurements of Group A and Group B, which differences have a value of $1 or less?

Revolt · Accepted Answer

the mean and the median

Question 7

A survey of a group of seventh graders and a group of teachers at a local middle school asked how many siblings they each have. The dot plots below show the results.StudentsTeachersWhich compares the medians of the data?

Revolt · Accepted Answer

The median for the students is 2 and the median for the teachers is 3.

Question 8

There are twenty classes at Northwestern Middle School and twenty classes at Southeastern Middle School. The number of students in each class at each school is shown in the dot plots below.Number of Students in Each Class at Northeastern Middle School Number of Students in Each Class at Southeastern Middle SchoolMichela says that the modes of the two data are the same so the median and mean must also be the same. What is Michela’s error?

Revolt · Accepted Answer

The means and medians are not the same.

Question 9

The dot plots show the number of hours a group of fifth graders and seventh graders spent playing outdoors over a one-week period. Time Spent Playing Outdoors for Fifth Graders and Seventh GradersWhich statement correctly compares the shape of the data in the plots?

Revolt · Accepted Answer

In the seventh-grade data, the left side of the data looks similar to the right side, but not in the fifth-grade data.

Question 10

Renita analyzed two dot plots showing the snowfall during the winter months for City A and for City B. She found that the median snowfall is 5 inches less in City A than in City B and the mean snowfall is about 2 inches less in City A than in City B. Which explains why there is a difference in the measures of center for the sets of data?

Revolt · Accepted Answer

One set of data has more variation than the other.

Analyzing Dot Plots Answers

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