DATA & STATISTICS UNIT TEST

At the zoo, the length of each iguana is measured. Which statement is best supported by the information below?

• Over half of the iguanas measure 14 centimeters or more in length.

• 25% of the iguanas measure 12 centimeters in length.

• The number of iguanas that measure 15 centimeters or more is equal to the number that measure 11 centimeters or less.

Which of the conclusions best supports the dot plots?

• Both Jamal’s and Kendall’s race cars had an equal spread in their data.

• On average, Kendall’s race car traveled further.

• The median distance Jamal’s race car traveled was 6.5 ft.

• Both Jamal and Kendall had the same mode of data.

Which of the following represents the mean absolute deviation of Jamal’s data?

• 6.4

• 1.12

• 2.8

• 0.9

Mrs. Moore’s and Mrs. Ruiz’s classes are competing for the best scores on their math test. Use the box plots below to answer questions 7-8. Which of the following statements does not represent the data?

• The scores in Mrs. Ruiz’s class have less variability than the scores in Mrs. Moore’s class.

• The median of Mrs. Moore’s class is equal to the first quartile of Mrs. Ruiz’s class.

• The interquartile range of both classes is equal.

• The scores in Mrs. Moore’s class have a greater spread than the scores in Mrs. Ruiz’s class.

Which of the following represents the difference in centers of Mrs. Moore’s class and Mrs. Ruiz’s class?

• 7

• 11

• 4

• 3

The data set below represents the different costs of a tablet at an electronics store.

What is the median of the first half of the data? (first quartile)

$298, $196, $248, $379, $319, $276, $198, $349

The data set below represents the different costs of a tablet at an electronics store.

What is the median of the second half of the data? (third quartile)

$298, $196, $248, $379, $319, $276, $198, $349

The data set below represents the different costs of a tablet at an electronics store.

What is the interquartile range?

$298, $196, $248, $379, $319, $276, $198, $349

A company surveyed all of the employees in their Columbus, Ohio office, one of their six national offices. Based on the survey, they determined that 72% of all employees were satisfied with their job. Which of the following explains why this is NOT a random sample?

• A. They only surveyed people who had been at their job for five years or more

• B. They did not survey employees in other offices around the country

• C. The survey was conducted electronically

• D. The survey had a time limit

The number of points in the first five games of the basketball season are listed below. What is the mean number of points scored?