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A mean birth weight of male babies born to 130 mothers taking a vitamin supplement is 3.43 kilograms with a standard deviation of 0.68 kilogram.
A mean birth weight of male babies born to 130 mothers taking a vitamin supplement is 3.43 kilograms with a standard deviation of 0.68 kilogram. Test the claim that the mean birth weight of all babies born to mothers taking the vitamin supplement is equal to 3.38 kilograms, which is the mean for the population of all male babies. Use a 0.05 significance level
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