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 2600 grams and a standard deviation of 800 grams while babies born after a gestation period of 40 weeks have a mean weight of 3000 grams and a standard deviation of 395 grams. If a 34-week gestation period baby weighs 2150 grams and a 41-week gestation period baby weighs 2550 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.) 0 A The baby born in week 34 weighs relatively less since its z score is larger than the z-score of O B. The baby born in week 41 weighs relatively less since its z-score, is larger than the z-score of O C. The baby born in week 34 weighs relatively less since its z-score, is smaller than the z-score of 0 D. The baby born in week 41 weighs relatively less since its z-score, , is smaller than the z-score of week 41 week 34 in week 41 in week 34 for the baby born in for the baby born in for the baby born for the baby born

Explanation / Answer

z score for a 34 week baby = (2150 - 2600)/800 = -0.56

z score for a 41 week baby = (2550 - 3000)/395 = -1.14

Hence,

Option D; -1.14; -0.56

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