Question 409984
If the decision is to reject the null hypothesis of no difference between two population parameters, z distribution at the .01 significant level, what is the correct statement of the alternate hypothesis and rejection region? 
A. µ1 &#8800; µ2 ; z > 2.58 and z < negative 2.58 
B. µ1 &#8800; µ2 ; z > 1.96 and z < negative 1.96 
C. µ1 > µ2; z > 2.33 
D. µ1 > µ2; z < negative 2.33
----
You are rejecting the Ho of equality.
So Ha is u1 is not equal to u2
----
This is a 2-tail test with 0.005 in 
each tail.
--
invNorm(0.005) = -2.58
---------------
Ans: A
=============
Cheers,
Stan H.
=============