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6.5 Examples

6.5 Examples. #12 Section 6.5. The lengths of pregnancies are normally distributed with mean of 268 days and standard deviation of 15 days. Find the probability that one randomly selected woman has a pregnancy less than 260 days.

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6.5 Examples

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  1. 6.5 Examples

  2. #12 Section 6.5 The lengths of pregnancies are normally distributed with mean of 268 days and standard deviation of 15 days. • Find the probability that one randomly selected woman has a pregnancy less than 260 days. • If 25 randomly selected women are put on a special diet just before they become pregnant, find the probability that their lengths of pregnancy have a mean that is less than 260 days. • If the 25 women do have a mean of less than 260 days, does it appear that the diet has an effect on the length of pregnancy, and should the medical supervisors be concerned?

  3. #20 Section 6.5 Assume that the population of human body temperatures has a mean of 98.6 degrees with a standard deviation of 0.62 degrees. If a sample of size 106 is randomly selected, find the probability of getting a mean temperature of 98.2 degrees? Does that probability suggest that the mean body temperature is not 98.6 degrees?

  4. #11 Section 6.5 A Vail, CO gondola has a plaque that states the maximum capacity is 12 people or 2004 lbs. (167 lb per person).Men have weights that are normally distributed with a mean of 172 lb and a standard deviation of 29 lb. • Find the probability that if an individual man is randomly selected his weight will be greater than 167 lb. • Find the probability that 12 randomly selected men will have a mean that is greater than 167 lb. • C. Does the gondola appear to have the correct weight limit? Why or why not?

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