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The heights of 18-year-old men are approximately normally distributed with mean 68 inches and standard deviation 3 inches. What is the probability that the height of an 18-year-old man selected at random is between 64 inches and 66 inches

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What is the probability that an 18 year old man selected at random is ... what is the probability that the mean height bar x is between 67 and 69 inches? c. ... approx normally distributed with mean 68 inches and std deviation 3 inches? a. ... is used in stead of standard deviation as you have a random sample.

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