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1. Men’s heights are normally distributed with a mean of 69" and a standard deviation of...

1. Men’s heights are normally distributed with a mean of 69" and a standard deviation of 2.5". Draw the distribution curve; label the mean and 3 standard deviations above and below the mean. Answer the following question:

a. Between what heights do 68% of men fall?

b. What percentage of men are shorter than 74"?

c. What percentage of men are taller than 65"?

2. The middle 95% of adults have an IQ between 60 and 140. Assume that IQ for adults is normally distributed.

a. What is the average IQ for adults? The standard deviation? Draw and label this distribution.

b. How many adults have an IQ between 110 and 150?

c. If your ward of 200 students is a representative sample of the population, how many have an IQ greater than 150?

Math   Statistics-And-Probability   
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