You are given the following data. Test the claim that there is a difference in the means of the two groups. Use = 0.05.
Group A Group B
xbar1 = 2 xbar2= 5
s1= 19 s2= 18
n1= 31 n2= 49
• 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?