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Posted by on Wednesday, November 14, 2012 at 5:04pm.

The populaion mean annual salary of service desk managers is $48,000 with a standard deviation of $1,800. A sample of 36 service desk managers is randomly selected. What is the probability the mean annual salary of the sample is less then $47,550?

  • Statistics - , Thursday, November 15, 2012 at 1:13pm

    Z = (score-mean)/SEm

    Score = sample mean

    SEm = SD/√n

    Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

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