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the mean age at which men in the united states marry for the first time follows the normal distribution with a mean of 24.5 years. the standard deviation is 2.8 years. for a rabdom sample of 59 men, what is the likelihood that the age they were married were less than 25

  • statistics -

    z = (x-u)/sigma = (25 -24.5)/2.8 = .18

    F(.18) from normal table is about .57

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