Bluebook SAT Test Problem Solving and Data Analysis 3

Question 1

A data set has mean 50 and standard deviation 8. Which score is exactly 2 standard deviations above the mean?

Accepted Answer

66

Answer

58

Answer

62

Answer

70

Question 2

A two-way table shows: 30 athletes study math, 20 non-athletes study math, 70 athletes don't study math, 40 non-athletes don't study math. What is the probability that a randomly chosen athlete studies math?

Accepted Answer

3/10

Answer

1/4

Answer

3/8

Answer

3/16

Question 3

A random sample of 50 voters showed 30 support Candidate A. Based on this, what is the best estimate of the percentage of all voters who support Candidate A?

Accepted Answer

60%

Answer

50%

Answer

30%

Answer

70%

Question 4

The table shows: Product X has mean rating 4.2 and standard deviation 0.5; Product Y has mean rating 3.8 and standard deviation 1.2. Which statement is correct?

Accepted Answer

Product X has more consistent ratings than Product Y

Answer

Product Y has more consistent ratings than Product X

Answer

Both products have equally consistent ratings

Answer

Product X has a higher standard deviation

Question 5

A store tracks daily customers for a week: 45, 52, 38, 61, 55, 48, 50. What is the range of this data?

Accepted Answer

23

Answer

49.9

Answer

52

Answer

16

Question 6

If a fair six-sided die is rolled twice, what is the probability of getting a sum of 8?

Accepted Answer

5/36

Answer

1/6

Answer

7/36

Answer

1/4

Question 7

Which measure of central tendency would be most affected by adding the outlier 200 to the data set {10, 12, 11, 13, 14}?

Accepted Answer

Mean

Answer

Median

Answer

Mode

Answer

Range

Question 8

A scatter plot shows a negative correlation between price and units sold. If the line of best fit is y = -5x + 300, approximately how many units are sold when price x = 40?

Accepted Answer

100

Answer

140

Answer

200

Answer

80