1
Q
What are the 4 assumptions for hypothesis testing about the difference of two population means?
A
*random samples from each of the population is drawn
*sample individuals are independent of each other
*both populations are normal or we need reasonably large samples
to validate using the CLT
*both population distributions have equal variances
2
Q
What assumption does the pooled standard deviation require?
A
That the population variances are equal.
