7th Grade Data & Statistics Unit Test

If there are 220 members of the 7th grade class, then how many students can be expected to prefer the zoo?

• A. 39

• B. 48

• C. 120

• D. 66

If there are 180 members of the 8th grade class, then what percent preferred the museum?

• A. 65%

• B. 47.5%

• C. 17.5%

• D. 26%

What is the spread (range) in the data for Mr. Zimmerman's class?

• 3

• 0

• 6

• 7

What was the difference in the median number of TV's per household for Mrs. Jamison's and Mr. Zimmerman's class?

• 2.5

• 3

• 1

• 2

What is the median of the first half (Q1) of the data set: $248, $196, $248, $379, $319, $276, $198, $349, $196?

• $197

• $276

• $349

• $379

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?

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

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

• The survey was conducted electronically.

• 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? 38, 29, 16, 42, 33

• 31.6

• 32

• 31.2

• 30.5

When applying for a job, Micah is told that the starting salary is $1,793 per month and the maximum salary is $2,669. What is the salary range Micah can earn with this position?

• $2,669

• $4,462

• $1,793

• $876

A middle school has 6th, 7th, and 8th grade students. Which of the following would be a random sample of the students?

• Surveying all of the teachers

• Surveying the students who buy their lunch in the cafeteria

• Surveying everyone whose last name begins with a G

• Surveying every tenth student on the class rosters

The dot plot below represents the number of dollars in allowance that students receive each week in Mrs. Jimenez's class. What is the median amount of allowance?

• 6
• 4
• 8
• 7.5