Analyzing Dot Plots

Question 1

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 2

The heights of a group of boys and girls at a local middle school are shown on the dot plots below. When comparing the shapes of the two sets of data, what conclusion can someone draw?

Revolt · Accepted Answer

The girls are generally taller than the boys.

Question 3

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.

Question 4

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 5

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 6

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 7

There are twenty classes at each of two middle schools. The number of students in each class at each school is shown in the dot plots below.Number of Students in Each Class at Poplar Middle School Number of Students in Each Class at Oak Middle SchoolWhich statement correctly compares the mean number of students for the data in the plots?

Revolt · Accepted Answer

There are about 2 more students in each class at Oak Middle School than at Poplar Middle School.

Question 8

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 9

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 10

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.

Analyzing Dot Plots Answers

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