, Question 1 2 pts To determine the degrees of freedom, one must subtract [x] from the sample size. -' Question 2 3 Pts Imagine that you are trying to compare a sample mean with a population with a known mean to test a null hypothesis that they are not significantly different. Your sample mean is 57, with a standard deviation of 6. The population mean, Va, is 53. The n-value for the sample is 12. Calculate the t-statistic. State to 2 decimal places. (No units) Question 3 3 pts If Y =14,s= 32, and n = 12, what is the critical value of trequired for a confidence interval of 95%? Give your answer to two decimal places. 2.2 Question 4 4 pts A sample of size n = 101 produced the sample mean of Y = 16 with a standard deviation of 3. Compute a 95% confidence interval for the population mean u. Express your answer to one decimal place. This question has no units. Use the table on page 709 of your textbook. 95% confidence interval of the population mean is 15-4