Question 4 A researcher conducts an independent-samples t test comparing two group means of 11.3 and 12.7. She also obtains values of 2.2 for sdifference 4.64 for pooled variance, and 40 for degrees...

Extracted text: Question 4 A researcher conducts an independent-samples t test comparing two group means of 11.3 and 12.7. She also obtains values of 2.2 for sdifference 4.64 for pooled variance, and 40 for degrees of freedom total. What decision should she make based on these data? O Fail to reject the null hypothesis, these groups are the same. Reject the null hypothesis, group one is superior to group two. Reject the null hypothesis, there is something different about these groups. Fail to reject the null hypothesis, we cannot say if these groups are different.