Bluebook SAT Test One-Variable Data: Distributions and Measures of Center and Spread 5

Question 1

A frequency table shows: Score 70 (frequency 3), Score 80 (frequency 5), Score 90 (frequency 2). What is the mean score?

Accepted Answer

79

Answer

80

Answer

78

Answer

81

Question 2

Which of the following would most increase the standard deviation of the dataset {10, 12, 14, 16, 18}?

Accepted Answer

Replace 14 with 50

Answer

Replace 10 with 11

Answer

Replace 18 with 17

Answer

Replace 12 with 13

Question 3

The range of a dataset is 30 and the minimum is 15. What is the maximum?

Accepted Answer

45

Answer

30

Answer

15

Answer

25

Question 4

A histogram shows that 50% of values fall below the 6th bar. What does this suggest about the 6th bar's value relative to the dataset?

Accepted Answer

It is the median

Answer

It is the mean

Answer

It is the mode

Answer

It is the maximum

Question 5

Two classes took the same test. Class A has mean 72 and standard deviation 8. Class B has mean 72 and standard deviation 3. Which statement is true?

Accepted Answer

Class B's scores are more consistent

Answer

Class A's scores are more consistent

Answer

Both classes performed the same overall

Answer

Class A has a higher median

Question 6

The dataset {x, 8, 11, 14, 17} has a mean of 12. What is the value of x?

Accepted Answer

10

Answer

12

Answer

11

Answer

8

Question 7

A dataset has an outlier that is extremely large. Removing the outlier would most likely:

Accepted Answer

Decrease the mean and have little effect on the median

Answer

Decrease the mean and decrease the median

Answer

Increase the mean and decrease the median

Answer

Have no effect on the mean or median