AST Data Analysis and Statistics

Question 1

The ages of 7 students are: 14, 16, 15, 17, 14, 18, 15. What is the median age?

Accepted Answer

15

Answer

14

Answer

16

Answer

17

Question 2

A survey found that 45% of students prefer math. If 200 students were surveyed, how many prefer math?

Accepted Answer

90

Answer

80

Answer

85

Answer

95

Question 3

The data set {3, 7, 7, 9, 11} has a mean of 7.4. What is the range?

Accepted Answer

8

Answer

4

Answer

6

Answer

7

Question 4

Which measure of central tendency is most affected by an extreme outlier?

Accepted Answer

Mean

Answer

Mode

Answer

Median

Answer

Range

Question 5

A scatter plot shows a strong negative correlation. This means as x increases, y:

Accepted Answer

decreases

Answer

increases sharply

Answer

stays constant

Answer

increases slightly

Question 6

A class scored: 72, 85, 90, 88, 76, 92, 85. What is the mode?

Accepted Answer

85

Answer

88

Answer

90

Answer

72