Question

The heights of mature Iowan corn stalks are normally distributed with mean height of 95 inches and standard deviation of 10 inches. What is the height of the 75% percentile mature Iowan corn stalk?

Answer 1

X :  heights of mature Iowan corn stalks

X ~ N (95,10)

let a be the 75 the percentile.

according to the problem,

[ in any blank cell of excel type =NORMSINV(0.75) ]

the height of the 75% percentile mature Iowan corn stalk is 101.74 inches.

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