Assuming the population variances are unknown and equal, you wish to test whether the Group 1 population mean is equal to the Group 2 population mean. The resulting test statistic is a Student-t with how many degrees of freedom

Step-by-step explanation:

If we had 2 independent samples with population variances unknown and equal and we want to compare the population mean between the both groups, the test statistic will be:

Where

So, the t-student has degrees of freedom

Where and are the means of the groups, and are the size of the samples and and are the sample variances.

based on context clues you gave i'm assuming the answer would be c.

98%

step-by-step explanation: