This is also known as the “Small sample” t-test for the difference between two population means. In BUS 233 and more generally, use the t-test when you do not know the populations’ sigmas.

Start by reading the problem statement carefully. Enter your data in the blue cells only. If you are given raw data, find the means and standard deviations of the two samples and then enter the summary data here.

If a mean difference is given, enter it; if not, enter 0. If a mean difference is given, be especially careful to enter the samples in the correct order.

In the orange cells in part 2, select the appropriate operator for the variances and the claim. To get the math operator drop-down menu, left-click in the orange cells, e.g. on the current operator. All the yellow cells will automatically update.

Hope this helps.

Dr. Dawn

Update 11/13/17 V1.04