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Refer to Exercise 6 8 a Calculate the mean x the

Refer to Exercise 6.8.

a. Calculate the mean, μx, the variance, σ2x, and the standard deviation, σx.

b. Find the probability that the waiting time of a randomly selected patron will be within one standard deviation of the mean.

a. Calculate the mean, μx, the variance, σ2x, and the standard deviation, σx.

b. Find the probability that the waiting time of a randomly selected patron will be within one standard deviation of the mean.

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