Posted by **peter** on Thursday, April 29, 2010 at 3:35pm.

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

xbar= 3.05, s1 = .20, n1 = 15, xbar2= 3.25, s2 = .30, n2 = 15, รก = .025, left-tailed test.

calculate

d.f. ____________

Standard error ____________

t-calculated ____________

p-value ____________

t-critical ____________

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