Explore BrainMass

# Statistics: What should the experimenter conclude?

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

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 deviation of 3); the control group has a mean of 35 (with an estimated population standard deviation of 5). Using the .05 level, what should the experimenter conclude?

(a) Showing all work, use the 5 steps of Hypothesis testing,
(b) Sketch the distributions involved,
(c) Explain your answer to someone who is familiar with the t test for a single sample but not with the t test for independent means.

© BrainMass Inc. brainmass.com June 3, 2020, 11:53 pm ad1c9bdddf
https://brainmass.com/statistics/hypothesis-testing/statistics-what-should-the-experimenter-conclude-306475
\$2.19