AP Statistics Practice

1. Question 1
   • The mean is likely less than the median.
   • The mean and median are approximately equal.
   • The mean is likely greater than the median.
   • The standard deviation is equal to the interquartile range.
2. Question 2
   • Variance
   • Interquartile range
   • Range
   • Standard deviation
3. Question 3
   • 18
   • 12
   • 5
   • 10
4. Question 4
   • The median is more affected than the mean.
   • The mean is more affected than the median.
   • The IQR is more affected than the standard deviation.
   • The range is less affected than the standard deviation.
5. Question 5
   • 99.7%
   • 68%
   • 50%
   • 95%
6. Question 6
   • Left-skewed
   • Bimodal
   • Uniform
   • Symmetric
7. Question 7
   • Compare the lengths of the boxes to assess spread.
   • Compare the symmetry of the distributions.
   • Compare the medians to assess center.
   • Compare the number of observations in each group.
8. Question 8
   • +1.5
   • +1.0
   • -1.0
   • +0.5
9. Question 9
   • Mode
   • Median
   • Standard deviation
   • Mean
10. Question 10
    • 55
    • Cannot be determined without the original values
    • 55 multiplied by the sample size
    • 50
11. Question 11
    • Left-skewed
    • Symmetric
    • Uniform
    • Right-skewed
12. Question 12
    • 25% of the data is between 20 and 30.
    • The interquartile range is 15.
    • The value 50 is a potential outlier.
    • The distribution is symmetric.
13. Question 13
    • Keep the median the same.
    • Increase the median.
    • Increase the standard deviation.
    • Decrease the median.
14. Question 14
    • Multiplying all observations by 0.5
    • Adding a new observation far from the mean.
    • Adding a new observation close to the mean.
    • Decreasing the sample size.
15. Question 15
    • The distribution is likely right-skewed.
    • The distribution is likely symmetric.
    • The distribution has no outliers.
    • The distribution is likely left-skewed.
16. Question 16
    • Range
    • Standard deviation
    • Median absolute deviation
    • Interquartile range
17. Question 17
    • Mean
    • Lower quartile (Q1)
    • Median
    • Interquartile range (IQR)
18. Question 18
    • -3
    • 10
    • 3
    • 12
19. Question 19
    • The mean must be 0.
    • All values are the same.
    • The median must be 0.
    • The range must be 1.
20. Question 20
    • The mean is greater than the median.
    • The relationship cannot be determined.
    • The mean is equal to the median.
    • The mean is less than the median.
21. Question 21
    • The variables have a weak linear relationship, but a nonlinear relationship exists.
    • The variables have a weak positive relationship.
    • The variables have a strong positive linear relationship.
    • There is no relationship between the variables.
22. Question 22
    • The sum of the squared horizontal distances from the points to the line.
    • The sum of the squared perpendicular distances from the points to the line.
    • The sum of the vertical distances from the points to the line.
    • The sum of the squared vertical distances from the points to the line.
23. Question 23
    • Has a large residual.
    • Is an outlier in the x-direction and has a large effect on the slope.
    • Has a y-value far from the regression line.
    • Has an x-value equal to the mean x.
24. Question 24
    • The linear model fits the data well.
    • There are outliers in the data.
    • A linear model is not appropriate for the data.
    • The correlation is close to 1.
25. Question 25
    • For each one-unit increase in x, the predicted value of y increases by 2.5.
    • When x = 0, the predicted value of y is -2.5.
    • The correlation is -2.5.
    • For each one-unit increase in x, the predicted value of y decreases by 2.5.
26. Question 26
    • There is a strong positive linear relationship between study hours and exam score.
    • Increasing study hours causes exam scores to increase.
    • The slope of the regression line is 0.85.
    • 85% of the variation in exam scores is explained by study hours.
27. Question 27
    • $23,500
    • $17,500
    • $32,500
    • $26,500
28. Question 28
    • Students with high GPAs tend to play many video games.
    • Playing video games causes a student to have a lower GPA.
    • 92% of the variation in GPA is due to video game hours.
    • The strong negative association suggests that students who play more video games tend to have lower GPAs.
29. Question 29
    • The observed y minus the predicted y.
    • The observed x minus the predicted x.
    • The predicted y minus the observed y.
    • The observed y minus the mean y.
30. Question 30
    • The slope of the least-squares line is 0.99.
    • The points fall very close to an increasing straight-line pattern.
    • Changing x causes a predictable change in y.
    • The relationship must be causal.

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