Compute s.

(c) Compare the results of parts

(a) and (b). In general, how does the standard deviation change if each data value is multiplied by a constant c?

(d) You recorded the weekly distances you bicycled in miles and computed the standard deviation to be s 5 3.1 miles. Your friend wants to know the standard deviation in kilometers. Do you need to redo all the calculations?

Given 1 mile < 1.6 kilometers, what is the standard deviation in kilometers?