The distribution of weight measurements of adult women in Neverland is approximately Normal with mean 166 pounds and standard deviation 20 pounds.
Solution :
166 - 20 = 146 and 166 - 40 = 126
P(126 < x < 146) = P[(126 - 166)/ 20) < (x - ) / < (146 - 166) / 20) ]
= P(-2 < z < -1)
= P(z < -1) - P(z < -2)
= 0.1587 - 0.0228
= 0.1359
Answer = 13.59%
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