In a Neurological Study of the Effect of Environment on Mental

Multiple Choice

In a neurological study of the effect of environment on mental development, rats were randomly assigned to be raised in one of the four following test conditions: Impoverished (wire mesh cage - housed alone) , Standard (cage with other rats) , Enriched (cage with other rats and toys) , and Super Enriched (cage with other rats and toys changed on a periodic basis) . After two months, the rats were tested on a variety of learning measures, one of them being the number of attempts needed to learn to navigate a maze. The data for the maze task are below, along with means and standard deviation for each group.
-Suppose that, in reality, there is no association between test condition and number of attempts needed to learn to navigate a maze. Which of the following sets of tests would have the largest probability of at least one Type I error?

A) and
B) and
C)
D)
E) and and