degrees of freedom

If an experiment is conducted with 5 conditions and 6 subjects in each condition, what are dfn and dfe? a = Number of groups/conditions = 5 dfn = a - 1 don = 5 - 1 dfn = 4 N = 5 * 6 = 30 dfe = N - a dfe = 30 - 5 dfe = 25

Imagine a researcher wanted to test the effect of the new drug on reducing blood pressure. In this study, there were 50 participants. The researcher measured the participants' blood pressure before and after the drug intake. If we want to compare the mean blood pressure from the two time periods...

A toy factory makes 5,000 teddy bears per day. The supervisor randomly selects 10 teddy bears from all 5,000 teddy bears and uses this sample to estimate the mean weight of teddy bears and the sample standard deviation. How many degrees of freedom are there in the estimate of the standard...