Question 874991
 <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi
Ho: mean &#8804; $66,271 Claim
Ha: mean > $66,271
t(69484) = 3213/(11500/sqrt(64)) =3213/1437.5 = 2.2351
P(t > 2.2351) = tcdf(2.2351,100,63) = .0145
.0145 > .01 
Since the p-value is greater than 1%, fail to reject Ho.
Conclusion: The claim is reasonable at the 1% confidence level.