Dr Harris Conducts an Experiment in Which Rats Are First

Multiple Choice

Dr. Harris conducts an experiment in which rats are first subjected to various levels of environmental pollutants and then tested on a memory task. He finds that all subjects survived in the low- and moderate-exposure groups, whereas 7 of 20 rats died in the high-exposure group. Dr. Harris wants to conduct an analysis of variance on his data. What would be the most appropriate thing to do?

A) Eliminate the high-exposure group from the experiment.
B) Perform an unweighted means analysis.
C) Perform a weighted means analysis.
D) Go ahead and conduct the analysis of variance without worrying about the unequal sample sizes.