Question 236507
You are given the following data. Test the claim that there is a difference in the means of the two groups. Use = 0.01. 
Group A Group B
x1= 7 x2 = 10
s1= 12 s2 = 11
n1= 66 n1 = 92
----
Comment: The data seems to imply you are going to test a 
difference of proportions.  But your problem asks you
to test a difference of means.
To do that you would need to be able to calculate
two sample means.  The data is not there for testing
the difference of means.

--------------------------------
---

· State the null and alternate hypotheses
Ho: u1-u2 = 2
H1: u1-u2 is not zero
-------------------------------------
· Determine which test statistic applies, and calculate it
· Determine the critical value(s).
· State your decision: Should the null hypothesis be rejected?
==============================
Cheers,
Stan H.