Eight drugs were selected, and the prices for the human doses and the animal doses for the same amounts were compared. At α = 0.05, can it be concluded that the prices for the animal doses are significantly less than the prices for the human doses? If the null hypothesis is rejected, give one reason why animal doses might cost less than human doses.

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Human 0.67 0.64 1.20 0.51 0.87 0.74 0.50 1.22 Animal dose 0.13 0.18 0.42 0.25 0.57 0.57 0.49 1.28