A survey was conducted to measure the height of US men. Respondents were grouped

Question

A survey was conducted to measure the height of US men. Respondents were grouped by age. In the 20-29 age group, theheights were normally distributed, with a mean of 69.6 inches and astandard deviation of 3.0 inches. A study participant israndomly selected. a) need help on finding probability that his height is lessthan 66 inches. b) need help on finding probability that his height is between66 and 72 inches c) need help on finding probability that his height ismore than 72 inches A survey was conducted to measure the height of US men. Respondents were grouped by age. In the 20-29 age group, theheights were normally distributed, with a mean of 69.6 inches and astandard deviation of 3.0 inches. A study participant israndomly selected. a) need help on finding probability that his height is lessthan 66 inches. b) need help on finding probability that his height is between66 and 72 inches c) need help on finding probability that his height ismore than 72 inches

Explanation / Answer

Use a normal probability calculator to get the answer: http://www.stat.tamu.edu/~west/applets/normaldemo.html Let X be the height X~Normal(69.6, 32) a) P(X < 66) = 0.1151 b) P(72> X > 66) = P(X72) = 0.2119 Hope this helps!

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