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AP Statistics free-response and interpreting computer output quiz quiz

12questions. Pick an answer and you'll see why right away.

  1. What is the single most common reason AP Statistics free-response answers lose marks?

  2. Which four features should a full-credit description of a quantitative distribution cover?

  3. For a strongly right-skewed distribution, which center and spread should you report?

  4. Which is a correct COMPARISON of two distributions for full credit?

  5. In regression computer output, the value labeled R-Sq (say 81%) is interpreted as:

  6. Output shows Constant Coef = 12 and a predictor (HoursStudied) Coef = 8 for predicting exam score. What is the regression equation?

  7. How do you interpret the slope of 8 in y-hat = 12 + 8x (score on hours studied) for full credit?

  8. In the output, S = 4.2 (the standard deviation of the residuals) is best interpreted as:

  9. A regression has R-Sq = 0.64 and a negative slope. What is the correlation r?

  10. A study finds, in observational data, that coffee drinkers have more heart disease. What is the correct conclusion?

  11. A regression line valid for x from 5 to 20 is used to predict at x = 40. What is the problem?

  12. A residual plot for a linear fit shows a clear U-shaped (curved) pattern. Is the linear model appropriate?