Question: Time spent usinge-mail per session is normallydistributed, with =11 minutes and =3 minutes. Assume that the time spent per session is normally distributed. a. If

Time spent usinge-mail per session is normallydistributed, with =11 minutes and =3 minutes. Assume that the time spent per session is normally distributed.

a. If you select a random sample of 50 sessions, what is the probability that the sample mean is between 10.8 and 11.2 minutes?

b. If you select a random sample of 50 sessions, what is the probability that the sample mean is between 10.5 and 11 minutes?

c. If you select a random sample of 100 sessions, what is the probability that the sample mean is between 10.8 and 11.2 minutes?

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