Final Exam Study Guide

Maria wants to find out which school lunch option is most popular among students. Which group(s) should Maria survey to get accurate results?

• randomly selected students from each grade

• randomly selected students who bring lunch from home

• randomly selected boys in her class

• randomly selected students from the soccer team

Sophia and Daniel are interested in learning about the preferred weekend hobbies of 7th grade students at North Middle School. Which group should they survey to obtain the most representative data?

• all of the students on the soccer team

• all of the students in the art club

• a random selection of two girls and two boys from each 7th grade homeroom

• a random selection of two girls and two boys from the drama club

What is the difference between the means?

• 1

• 2

• 3

• 4

The table shows the results of three coins tossed simultaneously 200 times.

Outcome          Frequency
No head                  28
1 head                     77
2 heads                  72
3 heads                  23

Based on the data, what is the experimental probability of getting at least 1 head?

• 43/50

• 9/25

• 18/25

• 23/200

If Frances can paint 1/5 of a wall in 20 minutes, how long will it take her to paint a room with 4 walls?

• 60 minutes

• 100 minutes

• 400 minutes

• 500 minutes

If 1/3 of a gallon of paint covers 1/8 of a wall, how much paint is needed to cover the entire wall?

• 8 2/3

• 8 1/3

• 2 2/3

• 2 1/3

Which graph shows a linear relationship with a positive slope?

• Graph A

• Graph B

• Graph C

• Graph D

What is the value of the expression 2 + (14 - 24) - (-3)?

• -11

• -5

• 5

• 11

Which of the following expressions simplify to a negative number?

• 4 - 7

• -2 + 3

• -8 + 2

• 3 - 1

• -5 - 2

The change in temperature from 8 AM to noon is .

• -8

• -4
• 6

• 32