Analyzing Dot Plots

Question 1

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 2

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 3

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 4

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 5

Plot A shows the number of hours ten girls watched television over a one-week period. Plot B shows the number of hours ten boys watched television over the same period of time.Television Viewing Hours for a One-Week PeriodWhich statement correctly compares the measures of center in the two sets of data?

Revolt · Accepted Answer

Both the mean and median are greater for Plot A than for Plot B.

Question 6

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 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.StudentsTeachersWhat is closest to the difference between the means of the two dot plots?

Revolt · Accepted Answer

1.5

Question 8

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 modes of the data?

Revolt · Accepted Answer

The mode for the students is 2 and the mode for the teachers is 4.

Question 9

Katelyn’s biology test scores are shown below. Biology Test ScoresKatelyn’s math test scores are shown below.Math Test ScoresKatelyn says that her biology test scores are much higher than her math test scores. Based on the shape of the data, which explains whether Katelyn is correct?

Revolt · Accepted Answer

Katelyn is not correct because the middle of the data is about the same for each plot.

Question 10

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.

Analyzing Dot Plots Answers

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