We want to conduct a hypothesis test of the claim that the population mean reading speed of second graders 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 population mean. Then calculate that statistic..

a>. The sample has size 95, and it is from a non normally distributed population with a known standard deviation of 2.9

z=

t=

It is unclear which test statistic to use