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    Application of Significance Level

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    The manager of a computer software company wishes to study the number of hours senior executives spend at their desktop computers by type of industry. The manager selected a sample of five executives from each of three industries. At the .05 significance level, can she conclude there is difference in the mean number of hours spent per week by industry?

    Banking Retail Insurance
    12 8 10
    10 8 8
    10 6 6
    12 8 8
    10 10 10

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