It is estimated that 80 of all eighteenyear old women have w

It is estimated that 80% of all eighteen-year old women have weights ranging from 103.5 to 144.5 lb. Assuming the weight distribution can be adequately modeled by a normal curve and that 103.5 and 144.5 are equidistant from the average weight Mu , calculate sigma

Solution

Mean = (103.5 + 144.5)/2 = 124
Margin of Error (144.5