When studying confidence intervals for a t-distribution, we learned that it would require technology to determine the critical value for values that were not already on a table of values. We will use the Excel command TINV to calculate a critical value. The arguments for this command are =TINV(1 - CL, of). For example, to calculate the t-value for a 96% confidence interval with n = 20, you would find an empty cell and enter =TINV(1 - .96, 19) 11) Using n = 15 for the data in D1:D15, calculate the t-value for a 75% confidence interval. C A. 0.692 C B. 1.150 C. 1.200 C D. 1.345 12) Using the information from 9), 10), and 11) to calculate a 75% confidence interval for the population mean. A. (21.194, 26.806) B. (21.066, 26.934) C C. (20.928, 27.072) D. (21.315, 26.685)