Stats

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Suppose the time it takes for a purchasing agent to complete an online ordering process is normally distributed with a mean of 8 minutes and a standard deviation of 2 minutes. Suppose a random sample of 25 ordering processes is selected.

The standard deviation of the sampling distribution of mean times is

  • Stats -

    I think you are asking about the Standard Error of the mean (SEm).

    SEm = SD/√n

  • Stats -

    23

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