Unit 1 Study Guide

The box below shows the number of students in each sixth grade class at Bear Creek Middle School.

25, 32, 31, 31, 32, 32, 27

What is the average number of students in each class at Bear Creek Middle School?

• 30

• 29

• 31

• 32

Michael is being tested on how fast he can put together a puzzle. His score will be based on the mean of his speed from six trials of putting together puzzles. His rate, in minutes per puzzle, for the first five puzzles were 46, 52, 48, 50, and 44. At what speed will he need to put together his sixth puzzle to have a mean speed of 50 minutes?

• 8

• 10

• 50

• 60

A baker recorded the heights, in centimeters, of eleven cakes at the bakery.

Which answer choice represents the distribution of the heights of the cakes? Choose TWO correct answers.

• 
• 
• 
• 

Dante surveyed students to see how they feel about a proposal to choose a new school mascot. Which of the following is the BEST question for him to ask?

• 
• 
• 
• 

What is the median price of the money raised?

• $35.50

• $44.50

• $58.42

• $103.00

What is the lower Quartile in the distribution?

• $12

• $34

• $38

• $46

75% of the money raised is less than which of the following amounts?

• $82.83

• $88.00

• $95.00

• $103.00

What is the interquartile range(IQR)?

• $88.00

• $46.00

• $50.00

• $11.00

• II, only

• III, only

• I and II

• I and III