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true or false if there were 15 difference scores in a matched pairs design then there were 28 participants in the study

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15 * 2 = 30
A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 99% confident that the true mean is within 2 ounces of the sample mean? The standard deviation of the birth weights is known to be 7 ounces.
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