stats question

You want to reject the claim that there is no difference in the prices for chemistry and physics textbooks. The prices for 21 chemistry books and 21 physics books were obtained. If you think this is independent sampling, assume population variances are equal. Select the correct model from the list. O One sample, t test for mean O Matched pairs t-test O F-test comparing variances O One sample, Z test of proportion O Pooled variance t-test O One sample, Chi-square test of variance O Unequal variance t-test