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Random samples were taken over 2 weeks (14 days) of a drink machine and data was collected of each drink sold. The sample mean was 65.2 drinks with a deviation of 8.1 drinks. Construct a 95% confidence interval on the mean number of drinks sold per day.

  • Math -

    95% = mean ± 1.96 SEm

    SEm = SD/√n

    I'll let you do the calculations.

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