We want to test if there is a difference at the 95% condence level between the weights of people who prefer vanilla ice cream and the weights of people who prefer chocolate ice cream. We take the weights of a sample of 31 people who prefer vanilla ice cream and the weights of a sample of 31 people who prefer chocolate ice cream. We assume both populations have the same variance in weight What is the critical value necessarv to answer this question? We want to test if there is a difference at the 95% condence level between the weights of people who prefer vanilla ice cream and the weights of people who prefer chocolate ice cream. We take the weights of a sample of 31 people who prefer vanilla ice cream and the weights of a sample of 31 people who prefer chocolate ice cream. We want to be conservative and assume that the populations might have different variances in weight. What are the degrees of freedom for the critical value necessaryr to answer this question? We want to test if there is a difference at the 95% condence level between the weights of people who prefer vanilla ice cream and the weights of people who prefer chocolate ice cream. We take the weights of a sample of 31 people who prefer vanilla ice cream and the weights of a sample of 31 people who prefer chocolate ice cream. We assume both populations have the same variance in weight What are the degrees of freedom for the critical value necessarv to answer this