Given the variances of the two samples below, find the test value and the degrees of freedom that should be used in an F test.
Sample 1 Sample 2
Variance 7 13
Sample size 11 29
a. test value = 3.45; d.f.N. = 29 and d.f.D. = 11
b. test value = 0.54; d.f.N. = 28 and d.f.D. = 10
c. test value = 1.86; d.f.N. = 28 and d.f.D. = 10
d. test value = 1.36; d.f.N. = 29 and d.f.D. = 11