A veterinarian does research on the causes of enteroliths, stones that develop i

Question

A veterinarian does research on the causes of enteroliths, stones that develop in the colon of horses. She suspects that feeding alfalfa might be a cause. To investigate that suspicion, she selects five horses that are known to have enteroliths and compares the number of flakes of alfalfa they have eaten over a month with the number of flakes eaten by five horses free of enteroliths. The statistician at the local university tells the veterinarian that she cannot use a two-sample t test after a careful talk with the researcher because the:

two means E and H are not the same. statistician finds out from the researcher that number of flakes of alfalfa have a highly symmetric distribution. variances of the number of flakes of alfalfa are very different. statistician finds out that the distribution of the number of flakes of alfalfa is highly skewed.

Explanation / Answer

The correct answer that does not satisfy the assumption of two sample t test is D

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