A Web Usage Snapshot indicated a monthly average of 36 Internet visits of a particular website per user from home. A random sample of 20 Internet users yielded a sample mean of 36.9 visits with a...

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Extracted text: A Web Usage Snapshot indicated a monthly average of 36 Internet visits of a particular website per user from home. A random sample of 20 Internet users yielded a sample mean of 36.9 visits with a andard deviation of 5.3. At the 0.05 level of significance, can it be concluded that this differs from the national average? Assume the population is normally distributed. a) What test should be performed (z or t)? b) Find the critical value(s). c) Calculate the test statistic