Mathematics, 08.11.2019 06:31 decarlosgibbonsgggg

# Asample of 172 babies in the zinc group had a mean birth weight of 3072 grams. a sample of 158 babies in the placebo group had a mean birth weight of 3426 grams. assume that the population standard deviation for the zinc group is 792 grams, while the population standard deviation for the placebo group is 708 grams. determine the 95% confidence interval for the true difference between the mean birth weights for "zinc" babies versus "placebo" babies.

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Asample of 172 babies in the zinc group had a mean birth weight of 3072 grams. a sample of 158 babie...

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