Question

32 to 35 weeks have a mean weight of 2500 grams and a standard deviation of 800 grams while babies born after a gestation period of 40 weeks have a mean weight of 2800 grams and a standard deviation of 370 grams. If a 32​-week gestation period baby weighs 2375 grams and a 41​-week gestation period baby weighs 2675 ​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.)
A.
The baby born in week 32 weighs relatively less since its​ z-score, nothing​, is smaller than the​ z-score of nothing for the baby born in week 41.
B.
The baby born in week 41 weighs relatively less since its​ z-score, nothing​, is smaller than the​ z-score of nothing for the baby born in week 32.
C.
The baby born in week 41 weighs relatively less since its​ z-score, nothing​, is larger than the​ z-score of nothing for the baby born in week 32.
D.
The baby born in week 32 weighs relatively less since its​ z-score, nothing​, is larger than the​ z-score of nothing for the baby born in week 41.

Answer 1

Step-by-step explanation:

Answer:

Babies of 33 week weighs relatively less than the babies of 41 week.

Step-by-step explanation:

Z score is determined by

x-u/sd

A) For 33 Week baby

Given

Mean 2500

SD 800

Z score is

2600-2500/800 =0.125

B) For 41 Week baby

Given

Mean 2800

SD 425

x=2900

Z score is

2900-2800/425 =0.235

The z score depicts that the baby of 33 week or 41 week weighs more than the normal babies of same age group.

Thus, babies of 33 week weighs relatively less than the babies of 41 week.