Number of results: 2
Twenty students randomly assigned to an experimental group receive an instructional program: 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental group has a mean of 38 on the test(with an estimated population standard ...
Saturday, July 18, 2009 at 11:57am by Jerry
(a) and (c) Ho: u(ex) - u(ct) = 0 Ha:u(ex) – u(ct) is not equal to 0 Test stat: t = (38-35) / sqrt[9/20 + 25/30] = 2.6482 p-value = 2*P(t > 2.6482 with df = 48) = 0.0109 Conclusion: At the 5% significance level, reject Ho because the p-value is less than 5% I need part b ...
Saturday, July 18, 2009 at 11:57am by Mrs. Nation