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2. The distribution of heights of young men is approximately normal with mean 70 inches and...

2. The distribution of heights of young men is approximately normal with mean 70 inches and standard deviation 2.5 inches.

a) Sketch a normal curve on which the mean and standard deviation are correctly located. (It is easiest to draw the curve first, locate the inflection points, then mark the horizontal axis.)

b) What percentage of men are taller than 77.5 inches?
c) Between what two heights do the middle 95% of men's heights fall?

d) What percentage of men are shorter than 67.5 inches?

Math   Statistics-And-Probability   
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