Pre-Algebra Statistics Review

Ashley scored 80, 80, 83, 85, 90, and 77 on her tests this semester. If she wants an average of 85 on all of her test, what would her score need to be on her final test? 

• 85

• 95

• 97

• 100

Tags

CCSS.7.EE.B.3

Find the arithmetic mean of the given set of numbers:
0, 12, 10, 8, 15, 5, 20

• 8.33

• 11

• 10

• 12

The average of four numbers is 27. A new number, x, is added to these four, and the new average of the five numbers is 25. What is the value of x? 

• 14

• 15

• 17

• 18

Tags

CCSS.7.NS.A.3

Brenda's cat gave birth to six kittens. The kittens' weights are listed here: 1.6 oz, 1.8 oz, 2.3 oz, 0.98 oz, 1.2 oz, 3 oz
What is the average of the kittens' weight?

• 1.62 oz

• 1.81 oz

• 10.5 oz

• 2.8 oz

Tags

CCSS.6.NS.B.3

A graduating class has 300 women and 250 men. The women's ages averages to 27 and the men's ages averages to 29. What is the average age of the class?  

• 28

• 27.5

• 27.9

• Cannot be determined

Tags

CCSS.7.NS.A.3

What is the sum of the range, mean, median, and mode of the following data set? 
15, 2, 7, 3, 11, 5, 12, 2, 6

• 28

• 17

• 23

• 32

What is the sum of the mean and median of the following set of numbers:
5, 12, 7, 28, 8

• 20

• 12

• 24

• 8

Carl's semester math grade is based on the average of five unit tests. His scored were 88, 92, 79, and 95 on the first four tests. What does his score need to be on the next test in order to obtain a 90% as the final grade for the semester?

• 96

• 89

• 85

• 90

Tags

CCSS.7.EE.B.3

Which of the following is closest to the mean? 
5, 9, 11, 12, 13, 13, 18, 20

• 11

• 12

• 13

• 14

What is the mode of the data?

• book

• books

• books

• books