Consider the following data set.

82 85 65 91 81 78 94 84 86 84

a. Draw a graph similar to Fig. 3.5-.-

on page 133.

b. Compare the percentage of the observations that actually lie within two standard deviations to either side of the mean with that given by Chebyshev’s rule with k = 2.

c. Repeat part

(b) with k = 3.