Question 14 (1 point) You interview a random sample of 63 customers of a restaurant and find that the mean rating they give the establishment is 8.8 with a standard deviation of 0.3. Calculate the standard error of the sample mean. Note: 1- Round your intermediate numbers to 4 decimal places. 2- Round you final answer to 3 decimal places. Enter your final answer to 3 decimal places. Your Answer: Answer Question 15 (1 point) If the standard error of the sample mean is SE(T) = 23.7 and the sample size isn = 108, what is the sample standard deviation S? Note: 1- Round your intermediate numbers to 4 decimal places. 2- Round you final answer to 3 decimal places. Enter your final answer to 3 decimal places. Your Answer: Answer Question 16 (1 point) You are interested to test if the average amount spent on textbooks by McMaster students is lower than $490 per semester. You take a random sample of 968 students at McMaster and find that students in your sample spend on average $498.2 on textbooks per semester. If the standard deviation of the sample, s, is $107.69, calculate the associated test statistic (t-statistic) for this test. Note: 1- Round your intermediate numbers to 4 decimal places. 2- Round you final answer to 3 decimal places. Enter your final answer to 3 decimal places. Your Answer: Answer