Question: Find the values for each.

a. \({{t}_{\alpha /2}}\) and n = 18 for the 99% confidence interval for the mean

b. \({{t}_{\alpha /2}}\) and n = 23 for the 95% confidence interval for the mean

c. \({{t}_{\alpha /2}}\) and n = 15 for the 98% confidence interval for the mean

d. \({{t}_{\alpha /2}}\) and n = 10 for the 90% confidence interval for the mean

e. \({{t}_{\alpha /2}}\) and n = 20 for the 95% confidence interval for the mean