Question: Must use SPSS. Continuing computer problem 2, the researcher s then wanted to find whether, among those patients who did have heart attacks, there was a difference in the number of fatal attacks, depending on which mode of therapy had been provided. Of the surgery group, 25 of the patients suffered fatal heart attacks, whereas in the drug- therapy group, 33 had fatal attacks.

FATAL ATTACKS NONFATAL ATTACKS

SURGERY 25 116

DRUG THERAPY 33 84

Test the hypothesis that there is a difference in the risk of death from heart attacks, depending on the treatment provided.