### Analysis of variance- one way classification

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Analysis of variance- One way classification.

A pharmaceutical company wants to determine whether there is any difference among three different types of drugs (A, B and C ) with respect to how long they are retained in the body.  Fifteen people are randomly assigned - five to each drug. Data are collected on the number of days the drug remains in the body before no trace of the drug is found. The data from these tests are reported in the table below.  Are there differences among these 3 drugs with respect to how long they are retained in the body?  Use a level of significance of 0.01.

 Days in the body Drug A B C 81 82 68 84 88 82 79 89 71 86 90 81 70 76 73

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