Time spent using e-mail per session is normally distributed, Ask an Expert

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Time spent using e-mail per session is normally distributed, with μ = 8 minutes, and σ = 2 minutes. If you select a random sample of 25 sessions,

a) What is the probability that the sample mean is between 7.8 and 8.2 minutes?

b) What is the probability that the sample mean is between 7.5 and 8 minutes?

c) If you select a random sample of 100 sessions, what is the probability that the sample mean is between 7.8 and 8.2 minutes?

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9374088

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