Suppose babies born after a gestation period of 32 to 35 weeks have a mean weigh

Question

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 3000 grams and a standard deviation of 800 grams while babies born after a gestation period of 40 weeks have a mean weight of 3600 grams and a standard deviation of 485 grams. If a 35 -week gestation period baby weighs 2800 grams and a 40 -week gestation period baby weighs 3400 grams, find the corresponding z-scores. Which baby weighs less relative to the gestation period? Find the corresponding z-scores. Which baby weighs relatively less? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.)

Explanation / Answer

z score for 35 week baby = (2800 - 3000)/800 = -0.25

z score for 40 week baby = (3400 - 3600)/485 = -0.41

Since the z score for a 40 week baby is less, this baby weighs relatively less.

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