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    Finding the interval estimates for true sales

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    In the second 14 weeks of the Books R Use data, the mean total sales were $19,543. The standard deviation was $11,502. At the .05 level of significance, what was the confidence interval? Did the value $16,400 fall inside our outside the confidence interval?

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    Solution Preview

    Please refer attached file for missing expressions.

    Sample mean= $19543
    Standard deviation=s=$11502
    Sample size=n=14
    Degrees of freedom=n-1=14-1=13

    Since ...

    Solution Summary

    The solution determines the interval estimate for the true sales.