Pre Algebra Statistics

What is the mean of the following set of numbers rounded to the nearest ones place? 13, 15, 100, 54, 345

• 100

• 135

• 105

• 106

The mean of five numbers of 40. The mean of the two smallest numbers is 25. What is the mean of the other three numbers? 

• 40

• 45

• 50

• 60

Peter received the following four grades on his math tests: 86, 90, 88, and 96. What was Peter's average for the four tests? 

• 89

• 91

• 88

• 90

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

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

If Point X is located at -10 on a number line and Point Z is located at 101 on the number line, what is the midpoint of line XZ?

• 43.5

• 44.5

• 45.5

• 46.5

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?

• 62 oz

• 81 oz

• 10.5 oz

• 2.8 oz

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

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

• 20

• 12

• 24

• 8