Question 1194299
mean M1=8140 with s1=251.9
mean M2=7760 with s2=206.5
sp=(s1^2+s2^2)/2
=230.32
Ho: means equal
Ha; they aren't equal
alpha=0.05 p{reject Ho|Ho true)
test is a t (0.975 df=8)
critical value is |t|>2.306
t=380/230.3*sqrt(1/5+1/5)=380/145.84
t=2.61, which is greater than the critical value, so reject Ho and conclude there is a difference at the 0.05 level.
p-value =0.03.