AP Statistics Review

Front

Best estimate of the standard deviation of the distribution in the figure? Options: 18, 9, 54, 97, 106

Back

9

Front

Which sample statistic remains the same after correcting the highest expense in a sample of 25 employees' child care costs, where the corrected amount is still greater than or equal to any other expense? Options: variance, mean, mode, range, median.

Back

median

Front

What is the best description of the standard deviation of employees' salaries?

Back

Approximately the mean distance between the individual salaries of employees and the mean of all employees' salaries.

Front

Equation of LSRL: ŷ = 5.3-0.23x. Find the residual for point (5, 4).

Back

-0.15

Front

Probability that Joe and Matthew each purchase 1 book on a random trip to the bookstore (use the probability distribution included).

Back

0.1250

Front

Bella's height is at the 87th percentile for adult women. Mean height: 65 inches, SD: 2 inches. What is her height in inches?

Back

67

Front

Is the experimental design good for testing the effect of hot temperatures on the elasticity of two brands of rubber bands?

Back

No, because temperature is confounded with brand.

Front

What is the best interpretation of Andrea's z-score of 1.75 for her systolic blood pressure compared to other women her age?

Back

Andrea's systolic blood pressure is 1.75 standard deviations above the average systolic blood pressure of women her age.

Front

The graph shows the distribution of scores of 30 students on a mathematics test. Based on the histogram, which statement must be true?

Back

The median test score is not greater than 80%.

Front

At a college the scores on the Spanish final exam are approximately normally distributed, with a mean of 75 and a standard deviation of 12. The scores on the Humanities final are also approximately normally distributed, with a mean of 80 and a standard deviation of 8. A student scored 81 on the Spanish final and 84 on the Humanities final. Relative to the students in each respective class, in which subject did this student do better?

Back

The student did equally well in each course.