Suppose a researcher wants to study the following research question: Are T2s in magnetic resonance (MR) imaging of malignant hepatic masses different from those for benign hepatic masses? One sample...

Suppose a researcher wants to study the following research question: Are T2s in magnetic resonance (MR) imaging of malignant hepatic masses different from those for benign hepatic masses? One sample includes 37 patients with malignant tumors; the mean T2 is 136.1 and the standard deviation is 26.3. The second sample includes 32 patients with benign tumors; the mean T2 is 91.7 and the standard deviation is 21.9. Conduct the student at a significance level of 0.05.

What is the critical value and test statistic ?