Experiment 12

Matched Pairs design
Matched Pairs t-test
Wilcoxon matched-pairs signed-ranks test

An experiment was performed using rats to investigate the hypothesis that a lack of visual stimulation early in life may lead to learning deficits later on. Two new-born rats were taken at random from each of eight litters. One member of each pair was reared in the dark for seven weeks. The other was reared normally. All rats were then tested on a maze-learning task, and the number of trials it took to reach criterion was recorded for each rat.

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