The shelf life of a particular dairy product is normally distributed with a mea

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The shelf life of a particular dairy product is normally distributed with a mea

2. The shelf life of a particular dairy product is normally distributed with a mean of 15 days and a standard deviation of 3 days.

a)  About what percent of the products last between 9 and 15 days? 68%

b)  About what percent of the products last between 12 and 15 days? 34%

c)  About what percent of the products last 6 days or less? .0250

d)  About what percent of the products last 15 or more days? .16