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    publié le 11/12/2009

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    Business statistics final assignment

    Document de 20 pages au format WORD

    RÉSUMÉ

    Final assignment answering different questions concerning business statistics.

    AUTRES

    Extract:

    Question 1

    The average age of chemical engineers is 37 years with a standard deviation of 4 years. If an engineering firm employs 25 chemical engineers, find the probability that the average age of the group is greater than 38.2 years old. If this is the case, would it be safe to assume that the engineers in this group are generally much older than average? (...)

    Find the 90% confidence interval of the population mean for the incomes of western Pennsylvania credit unions. A random sample of 50 credit unions is shown. The data are in thousands of dollars. (...)

    The daily salaries of substitute teachers for eight local school districts are shown. What is the point estimate for the mean? Find the 90% confidence interval of the mean for the salaries of substitute teachers in the region. (...)

    20

    Docs en anglais publié le 11/12/2009

    5,40 €

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