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On field trips science classes collect toads in a swamp. In June, 50 toads were caught with a mean weight of 1.1 ounces and with

On field trips science classes collect toads in a swamp. In June, 50 toads were caught with a mean weight of 1.1 ounces and with S=0.05 ounce. In August 25 toads were caught with a mean weight of 2.1 ounces and S=0.07 ounces. Does this indicate at the 1% significance level that august toads are heavier that June toads?

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