The heights of children are normally distributed. For three year old girls, the mean height is...
The heights of children are normally distributed. For three year old girls, the mean height is 38.7 inches and the standard deviation is 3.2 inches. Find P(x < 37). Enter your answer as an area under the curve with 4 decimal places. P(x < 37) =
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Solution :
Given that,
mean = 
= 38.7
standard deviation = 
=3.2
P(X< 37) = P[(X-
) /
< (37 - 38.4) / 3.2]
= P(z <-0.44 )
Using z table
= 0.3300
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