Urgent The height of an adult male in the United States is approximately normall

Question

Urgent

The height of an adult male in the United States is approximately normally distributed with a mean of 69.3 inches and a standard deviation of 2.8 inches.

Find the percentile P93 for the heights of adult males in the United States.

Provided your answer in inches, rounded to 2 decimal places.

WidgCo is a company that manufactures widgets. It is known that 1 out of every 41 widgets that the company produces is defective. A batch of 150 widgets is produced.

Find the probability that the number of defective widgets is exactly 4.

Round your answer to 4 decimal places.

Explanation / Answer

mean=69.3 and sd=2.8

P(x<X)=0.93

from normal distribution, this gives a z value of 1.48

thus (x-69.3)/2.8 =1.48

x=1.48*2.8+69.3 = 73.44

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