Question 1171701
SE is sqrt((s1^2/n1)+(s2^2/n2))
=sqrt((36/60)+(81/75))
=1.296
difference in means is 4
the t-value for df=133 is 3.08 
p-value for two way test is 0.0025
fail to reject Ho; the two samples should be treated as if they came from different populations.