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CLASS EXERCISE 1

  1. Graph the following distribution and determine which measure of central tendency and variability would be best to report:
  2. 1,2,2,1,2,4,4,5,2,5,2,1,4,5,2,5,4,1,5,5

  3. Assume Bob scored 90 on test 1 and 70 on test 2, Sally scored 80 on test 1 and 70 on test 2, Frank scored 60 on test 1 and 60 on test 2, Sue scored 40 on test 1 and 30 on test 2, and Sam scored 50 on test 1.
    • A. First plot the scores on a scatter plot
    • B. Then draw an estimated regression line and estimate Bob’s score on test 2.
    • C. Finally, determine the regression formula and estimate Bob’s score using this formula.