statistics
posted by Anonymous .
a random sample of 80 college students was selected to participate in a experiment. the mean of the sample is 317 points, the standard deviation of 37 there are 310 students that didn't complete the experiment
1. compute the appropriate test statistic?
2. what is the critical value of the test statistic?
3. given a data, what would you conclude
4. calculate a 95% and 99% confidence interval?

What hypothesis are you testing?