Answer Happy

A statistics instructor claims that statistical knowledge causes an increase in life satisfaction. They want to test this experimentally by having 358 students receiving no statistics training and then assessing life satisfaction (M1 = mul). Then the same 358 students receive statistical training and are assessed on their life satisfaction (u2 = mu2) and they want to assess if the difference in life satisfaction before and after statistical education (mu1 - mu2). Mi = mu1 = No additional statistics training and M2 = mu2 = Additional statistics training What would the degrees of freedom be for this research?