Question: # 1 Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a control group do not. After 6 months, both

# 1 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? Assume 2 tails. Step II: Give the characteristics of the comparison distribution -The shape is: -The mean is: -Compute the standard deviation of the distribution of differences between means using the following steps: 1-Pool the variances: 2-Compute the variance of the distribution of means for both groups 3-Compute the variance of the distribution of differences between means 4-Compute the standard deviation of the distribution of differences between means

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