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8 January, 23:08

Ten samples of a process measuring the number of returns per 100 receipts were taken for a local retail store. The number of returns were 10, 9, 11, 7, 3, 12, 8, 4, 6, and 11. Find the standard deviation of the sampling distribution for the p-bar chart.

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  1. 8 January, 23:31
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    Standard Deviation = 0.0273

    Step-by-step explanation:

    P = Total number of returns / (Sample * Timetaken)

    = 81 / (100 * 10)

    = 0.081

    Standard Deviation = √ ((P * (1 - P)) / Samples

    = √ ((0.081 * (1 - 0.081)) / 100

    = 0.0273
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