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Time spent using​ e-mail per session is normally​ distributed, with mu equals 7 minutes and sigma...

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Basic Math

Time spent using​ e-mail per session is normally​ distributed,with mu equals 7 minutes and sigma equals 2 minutes. Assume thatthe time spent per session is normally distributed. Complete parts​(a) through​ (d). a. If you select a random sample of 25 ​sessions,what is the probability that the sample mean is between 6.8 and 7.2​minutes?

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