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Q1) Time Spent using e-mail per session is normally distributed, with µ = 8 minutes and σ = 2 minutes. If you choose a random sample of 25 sessions,

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

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

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

d) Describe the difference in result of (a) and (b).

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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