Question: Time spent using email per session is normally distributed with of 8 minutes, with a population standard deviation () of 2.5 minutes. A sample of

  1. Time spent using email per session is normally distributed with of 8 minutes, with a population standard deviation () of 2.5 minutes. A sample of 25 sessions is drawn.

  1. What is the probability that a sample mean will be between 7.8 and 8.4 minutes?

  1. What is the probability that a sample mean will be between 7.6 and 8.2 minutes?

  1. Why do I need to state that the distribution of measures of time spent using email per session is normal in order to do parts a and b of this problem? Please answer in a single sentence.

d. Is the normal distribution a "continuous" or a "discrete" distribution? In a single sentence, explain why?

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