stats question

You want to support the hypothesis that the standard deviation of semester units taken by SJSU students is over 4 semester units. You will sample the GPAs of 40 SJSU students. Select the correct model from the list. O Unequal variance t-test O One sample, Z test of proportion O Matched pairs t-test O One sample, t test for mean O Pooled variance t-test O One sample, Chi-square test of variance O F-test comparing variances