Question 13 (Mandatory) (2 points) If the population standard deviation is not known, which of the following t-values should be used to construct a 99%% confidence interval for the mean with a sample of size n 17? 2.921 2567 O2098 2583 O 2.575 Question 14 (Mandatory) (2 points) For a t-distribution with 7 degrees of freedom, what is the probability to 2.1111 or t