Data Displays and Statistics

Question 1

Which data collections show bias? Check all that apply.

Question 2

Ariel wants to find out the most popular theme for spirit week at school. She cannot decide between two methods. Option 1: She will poll each student who leaves the gym after sports practice.Option 2: She will randomly poll three students from each first-period class.Which statement about the methods is true?

Revolt · Accepted Answer

Option 1 is biased.

Question 3

Leo wants to determine the average number of texts middle school students send in a day. Since all middle school students are enrolled in history, he randomly surveyed 4 students from each of Mr. Barnes’s eighth-grade history classes. Ms. Lopez and Mrs. Frank also teach eighth-grade history. What should Leo do to ensure his sample is representative of all middle school students?

Revolt · Accepted Answer

He should also take a sample from each of the other history classes in all of the other grades in the middle school.

Question 4

Which type of graph most readily shows the interquartile range for a data set?

Revolt · Accepted Answer

box plots

Question 5

Phoebe surveyed teens and adults to find the average number of hours of sleep they get during the week. Her results are shown below. Which statement regarding her survey results is true?Hours of Sleep for TeensHours of Sleep for Adults

Revolt · Accepted Answer

Adults have less variability in the hours of sleep.

Question 6

The dot plot and box plot show different displays of the ages of runners on a track team.Which statements best describe the dot plot or box plot? Check all that apply.

Revolt · Accepted Answer

Add the number of dots above each age in the dot plot to find the number of players on the team: 2 + 1 + 3 + 2 + 3 + 2 = 13.; The median appears clearly on the box plot at the line within the box: 10.

Question 7

Rodell wants to find the favorite gaming app among the students at his school. He decides to poll the thirty students on his football team and the fifteen students on his basketball team to gather the data. What is wrong with Rodell’s method for collecting his data?

Revolt · Accepted Answer

Rodell only polled fellow athletes; this sample does not represent nonathletes at the school.

Question 8

Which dot plot shows a sample that is most representative of the number of pets in a household?

Revolt · Accepted Answer

A dot plot going from 0 to 6. There are 3 dots above 0, 5 dots above 1, 4 dots above 2, 3 dots above 3, 2 dots above 4, 0 dots above 5, and 1 dot above 6.

Question 9

Logan wants to move to a new city. He gathered graphs of temperatures for two different cities. Which statements about the data sets shown are true?City ACity B

Revolt · Accepted Answer

City A is likely to have temperatures that remain fairly constant year round because it has a compact interquartile range compared to that of City B.; City B is likely to have more extreme temperatures with colder days in winter and hotter days in summer because the range is greater than that of A.; City B is likely to have more lower temperatures than City A because the median for City B is lower.

Question 10

Madison claims that two data sets with the same median will have the same variability. Which data set would provide good support for whether her claim is true or false?

Revolt · Accepted Answer

Her claim is false and she should use these to show that two data sets with the same median can have different variability.

Data Displays and Statistics Answers

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