Determine the t critical value(s) that will capture the desired t-curve area in each of the following cases. (Assume that central areas are centered at t = 0. Round your answers to three decimal places.) n USE SALT (a) Central area = 0.95, df = 15 (b) Central area = 0.95, df = 20 (c) Central area = 0.99, df = 20 (d) Central area = 0.99, df = 40 (e) Upper-tail area = 0.01, df = 25 (f) Lower-tail area = 0.025, df = 10

Find the area under the curve y = 9 cos Vx for 0 < x < 2. Round your answer to three decimal places. Area = i

Find the critical t-value such that the area left of the t-value is 0.1 with 21 degrees of freedom. Round answer to the thousandths place.

Find the z value or area for the charts shown below using the Standard Normal Distribution. (You can use the Normal Charts or the calculator!) (a) Area = .3521 Z = Round to two decimals places