Assume that the heights of men are normally distributed with a mean of 70.7 inches and a standard deviation of 2.1 inches. If 36 men are randomly selected, find the probability that they have a mean height greater than 71.7 inches.

Answer: P (x > 71.7) = 0.002

Step-by-step explanation:

Since the heights of the men are assumed to be normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - µ) / σ

Where

x = heights of the men.

µ = mean height

σ = standard deviation

From the information given,

µ = 70.7 inches

σ = 2.1 inches

The probability that they have a mean height greater than 71.7 inches is expressed as

P (x > 71.7) = 1 - P (x ≤ 71.7)

For x = 71.7

Since n = 36, then

z = (71.7 - 70.7) / 2.1/√36 = 2.86

Looking at the normal distribution table, the probability corresponding to the z score is 0.998

P (x > 71.7) = 1 - 0.998 = 0.002