A pharmaceutical company needs to know if its new cholesterol drug, Praxor, is effective at lowering cholesterol levels. It believes that people who take Praxor will average a greater decrease in...

A pharmaceutical company needs to know if its new cholesterol drug, Praxor, is effective at lowering cholesterol levels. It believes that people who take Praxor will average a greater decrease in cholesterol level than people taking a placebo. After the experiment is complete, the researchers find that the 39 participants in the treatment group lowered their cholesterol levels by a mean of 19.8 points with a standard deviation of 2.1 points. The 46 participants in the control group lowered their cholesterol levels by a mean of 18.4 points with a standard deviation of 2.8 points. Assume that the population variances are not equal and test the company’s claim at the 0.05 level. Let the treatment group be Population 1 and let the control group be Population 2.

H0:μ1=μ2

Ha:  μ1⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯μ2

Step 2 of 3:

Step 3 of 3 : Draw a conclusion and interpret the decision. reject or fail to reject. Is there enough evidence