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DarkendSinz30 Group Title

I need help with this question Anyone please....

  • one year ago
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  1. DarkendSinz30 Group Title
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    Assume that the population of heights of male college students is approximately normally distributed with mean  of 72.15 inches and standard deviation  of 6.39 inches. A random sample of 96 heights is obtained. Show all work. (A) Find P(x>73.25) (B) Find the mean and standard error of the xˉ distribution (C) Find P(xˉ > 73.25) (D) Why is the formula required to solve (A) different than (C)?

    • one year ago
  2. jim_thompson5910 Group Title
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    for A and C, you need a calculator or a table

    • one year ago
  3. jim_thompson5910 Group Title
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    for part b), the mean is xbar = 72.15 (since the mean of the xbar distribution is the population mean) and the standard error is sigma/sqrt(n) = 6.39/sqrt(96) = 0.6521766

    • one year ago
  4. jim_thompson5910 Group Title
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    in part D, the difference between the two formulas comes from the fact that the standard deviations are different (in the population, it's 6.39, but in the xbar distribution, it's 0.6521766)

    • one year ago
  5. DarkendSinz30 Group Title
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    okay thanks I see what your saying now

    • one year ago
  6. jim_thompson5910 Group Title
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    np

    • one year ago
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