Discuss the below:
Hypothesis test for the difference of population means: t test
Medical researchers interested in determining the relative effectiveness of two different drug treatments on people with a chronic mental illness established two independent test groups. The first group consisted of 15 people with the illness, and the second group consisted of 9 people with the illness. The first group received treatment 1 and had a mean time until remission of 182 days, with a standard deviation of 8 days. The second group received treatment 2 and had a mean time until remission of 181 days, with a standard deviation of 5 days. Assume that the populations of times until remission for each of the two treatments are normally distributed with equal variance. Can we conclude, at 0.1 the level of significance, that the mean number of days before remission after treatment 1 μ1 is greater than the mean number of days before remission after treatment 2 μ2 ?
Perform a one-tailed test.
Null Hypothesis?
Alternate Hypothesis?
Value of test statistic rounded to three decimal places:
Critical value rounded to three decimal places: