Question: You are given the following data. Test the claim that there is a difference in the means of the two groups. Use α = 0.01.
Group A Group B

_ __
x = 3 x = 8

1 2

s = 18 s = 19

1 2
n = 54 n = 84

1 2
??State the null and alternate hypotheses
??Determine which test statistic applies, and calculate it
??Determine the critical value(s).
??State your decision: Should the null hypothesis be rejected?