Bufferin Tablets Listed below are the measured weights (in milligrams) of a sample of Bufferin aspirin tablets. Given that this medication should be manufactured in a consistent way so that dosage amounts can be controlled, do the measures of variation seem to indicate that the variation is at an acceptable level?

672.2 679.2 669.8 672.6 672.2 662.2 662.7 661.3 654.2 667.4 667.0 670.7 In Exercises 9–12, find the range, variance, and standard deviation for each of the two samples, then compare the two sets of results. (The same data were used in Section 2-4.)