Question: According to a recent Gallup Poll, American men, on average, say they weigh 196 lbs.; women say they weigh 160 lbs. (source: Gallup.com). The sign
a. If weights for men have a normal distribution with a mean of 196 lbs. and a standard deviation, σm, of 30 lbs., how likely is it that 10 random men getting on the elevator will have a total weight greater than 2000 lbs.? Greater than 2250 lbs.?
b. If weights for women have a normal distribution with a mean of 160 lbs. and a standard deviation, σw, of 20 lbs., how likely is it that 10 random women getting into the elevator will have a total weight greater 2000 lbs.? Greater than 1700 lbs.?
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a Mean weight for the10 men would be 10196 1960 lbs for 10 men 949 lbs z 42 z 42 gives an area o... View full answer
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