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.

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The Answer of 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.

Dr Harris Conducts an Experiment in Which Rats Are First