Do a two-sample test for equality of means assuming unequal variances. Calculate thep-value using Excel.

(a-1)Comparison of GPA for randomly chosen college juniors and seniors:

x1= 4.25, s1 = .20, n1 = 15,x2= 4.6, s2 = .30, n2 = 15, = .025, left-tailed test.

(Negative values should be indicated by a minus sign. Round down yourd.f.answer to the nearest whole number and other answers to 4 decimal places. Do not use "quick" rules for degrees of freedom.)

d.f. ____________

t-calculated _______________

p-value ______________

t-critical _____________