Comparing Data and Variability

Which statement is true based on the box plots?

• Plot 2 has a larger spread than plot 1.

• Plot 1 and plot 2 have a center score of 60.

• Plot 1 has a minimum of 30 and plot 2 has a maximum score of 75.

• Plot 2 has a larger IQR than plot 1.

Answer the question pictured.

• I and II only

• I, II, and IV only

• II and III only.

• I, II, and III only.

Answer the question pictured.

• F

• G

• H

• J

Answer the question pictured.

• A

• B

• C

• D

The dot plots show the weights of a random sample of fish from two lakes. Pick the statement that describes the variability of the samples.

• The variability of the weights of the fish in Lake S is greater than the variability of the weights of the fish in Lake R.

• The variability of the weights of the fish in the two lakes are about the same.

• The variability of the weights of the fish in Lake R is greater than the variability of the weights of the fish in Lake S.

• You cannot determine variability based on a dot plot.

What conclusion can Ms. Long make about the performance of her first- and second-period classes?

• The first-period class had a higher median score than the second-period class.

• The second-period class scores had a higher mean than the first-period class scores.

• The first-period class scores had a greater range than the second-period class scores.

• The second-period class scores had a greater mean absolute deviation than the first-period class scores.

Which of the following is likely to have the greatest variability?

• F. The cost of a piece of candy from a vending machine

• G. The height of all the students at West Middle School

• H. The age of all the students in the sixth grade

• J. The number of days in a month

Which data set shows more variability? Explain your answer.

• Female

• Male

• Not enough information

7.SP.3

• A

• B

• C

• D

Which measure of variability should you use?

• IQR

• standard deviation