Choose the most appropriate analysis to analyze each research scenario below. a. A researcher wishes to learn if a certain drug slows the growth of tumors. She obtained mice with tumors and randomly divided them into two groups. She then injected one group of mice with the drug and used the second group as a control. After 2 weeks, she sacrificed the mice and weighed the tumors. The researcher is interested in learning if the drug reduces the growth of tumors. She hypothesizes that the mean weight of tumors from mice in group A will be less than the mean weight of mice in group B.

b. Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars, midsize cars, and full-size cars. It collects samples of pressure applied to the driverâs head during a crash test for each of the three car types. They are testing whether the pressure applied to the driverâs head is equal or not for each car type.