Mean of the Data Set

Ayvion's test grades in his math class are 89, 94, 82, 84, and 98. What score must he make on his next test to have a mean test score of 90?

Dr. Dre is a dentist. He needs to report on the average number of cavities that his patients have.
1,0,1,5,6,3,4

• 3.33

• 2.85

• 3

• 3.5

The table shows the attendance at the art show for the past week.

What does the attendance need to be on Saturday to have an average attendance for the week of 32 people per day?

The cost of the same quantity of gasoline at nine different gas stations is shown in the data set {17, 18, 22, 15, 17, 16, 25, 21, 20}. What is the mean cost of this amount of gas?

• $19

• $21

• $17.50

• $171

Aaron has 6 members in his family. His mom is 45, his dad is 47, his twin sisters are 21, and his brother is 18. If Aaron is 16 years old, what is the mean of the ages of his family members?

• 29.4

• 168

• 28

• 24.5

Mrs. Frenz has 5 members in her family. Her husband is 41, her son is 8, her oldest daughter is 5, and her youngest daughter is 1. If the mean of their ages is 17.8, how old is Mrs. Frenz?

• 35

• 34

• 31

• 28

What is the mean for these numbers?
5,5,5,5

• 5

• 20

• 15

• 100

The number of pages that Mia wrote in her journal each day from Monday to Friday is shown below: 9, 8, 12, 11, 20 What is the mean number of pages she wrote per day?

• 5

• 6

• 9

• 12

On the semester final, Joe scored 85, Jill scored 89, and Bill scored a 99.What was the average score for these students? _________

• 91

• 273

The 5th grade class was in charge of the dinosaur exhibit at the school science fair. Jason brought21 dinosaur models, Lisa brought 13 dinosaur models, Sara brought 6 dinosaur models, and Jimbrought 24 dinosaur models.What is the average number of dinosaur models that each student brought to the fair? _________

• 24

• 16

• 6

• 4