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A developmental psychologist who wanted to know if children who started walking earlier performed better in...

A developmental psychologist who wanted to know if children who started walking earlier performed better in school divided 30 children into Early and Late Walkers. The mean for Early walkers was 2.84 and the mean for late walkers was 2.77. He conducted a repeated measure t test and calculated a difference between means between the two groups. Then, he compared his calculation to the distribution of scores. It was not significant so he failed to reject the null.

List and describe two problems with his hypothesis test and/or conclusion.

Math   Statistics-And-Probability   
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