What are categorical variables? Answer: No meaningful order; averages cannot be taken and have meaning; numbers are not important except for the frequency.
What are examples of categorical variables? Answer: Gender, political affiliation, and eye color.
What are quantitative v...
AP Statistics A Final Exam Exam Paper
With Solutions 2024/2025
What are categorical variables? Answer: No meaningful order; averages cannot be taken and have
meaning; numbers are not important except for the frequency.
What are examples of categorical variables? Answer: Gender, political affiliation, and eye color.
What are quantitative variables? Answer: Order is meaningful; averages should have meaning;
numbers are very important.
What are examples of quantitative variables? Answer: GPA, number of pets, and salary.
Know how to interpret graphs and make reasonable inferences from a scenario. Answer: N/A
What is the equation of the mean? Answer: The sum of all data points divided by the number of
data points.
With a calculator, how do you calculate a five-number summary, standard deviation, and mean?
Answer: Stat, edit, enter all data points, quit, stat, calc, one-var stats.
What's the variance? Answer: Standard deviation squared.
What's the Empirical Rule? Answer: 68-95-99.7
, What's the Z-score formula? Answer: Data point of interest minus the mean, divided by the
standard deviation.
Z-scores find what with Table A? Answer: The area under the curve.
How do you perform linear regression on a calculator? Answer: Stat, edit, enter all data points, quit,
stat, calc, LinReg(ax+b), enter, enter. a is the slope, b is the y-intercept.
How do you find residuals on a calculator? Answer: 2nd, y=, enter, turn plot1 only on, 2nd, stat,
RESID in L2.
What does a positive residual mean? Answer: The observed value is greater than the predicted
value (LSRL).
What does a negative residual mean? Answer: The observed value is less than the predicted value
(LSRL).
What is the formula for calculating a residual? Answer: Observed value minus predicted value
(LSRL).
If the year is 2024, back-transform this to find y: log(y) = -98.43 + 0.05(year) Answer: 588.843
What is the formula for calculating the slope of a LSRL from summary statistics? Answer: correlation
coefficient times (standard deviation of y values divided by standard deviation of x values).
What is the formula for calculating the y-intercept of a LSRL from summary statistics? Answer: The
mean of the y values minus (the slope times the mean of the x values).
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