We want to conduct a hypothesis test of the claim that the population mean reading speed of a second grader is different from 31.3 words per minute. So we choose a random sample of students reading speeds. The sample has a mean of 31.5 words per minute and a standard deviation of 2.3 words per minute. For each of the following sampling scenarios choose an appropriate test statistic for our hypothesis test on the population mean. Than calculate the statistic.

b). The sample has size 14, and is from a normally distributed population with an unknown standard deviation