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The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days and a standard deviation of 13 days.

  • The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days and a standard deviation of 13 days. In what range would you expect to find the middle 50% of most pregnancies? Between and . If you were to draw samples of size 44 from this population, in what range would you expect to find the middle 50% of most averages for the lengths of pregnancies in the sample? Between and .
  • Engineers must consider the breadths of male heads when designing helmets. The company researchers have determined that the population of potential clientele have head breadths that are normally distributed with a mean of 7.1-in and a standard deviation of 0.8-in. In what range would you expect to find the middle 50% of most head breadths? Between and . If you were to draw samples of size 31 from this population, in what range would you expect to find the middle 50% of most averages for the breadths of male heads in the sample? Between and .
  • The lengths of pregnancies in a small rural village are normally distributed with a mean of 269.5 days and a standard deviation of 12.3 days. In what range would you expect to find the middle 50% of most pregnancies? Between and .
  • The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days and a standard deviation of 13 days. In what range would you expect to find the middle 50% of most pregnancies? Between and . If you were to draw samples of size 39 from this population, in what range would you expect to find the middle 50% of most averages for the lengths of pregnancies in the sample? Between and .
  • 7 Engineers must consider the breadths of male heads when designing helmets. The company researchers have determined that the population of potential clientele have head breadths that are normally distributed with a mean of 5.9-in and a standard deviation of 1.1-in. In what range would you expect to find the middle 98% of most head breadths? Between and . If you were to draw samples of size 44 from this population, in what range would you expect to find the middle 98% of most averages for the breadths of male heads in the sample? Between and .

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