Tom, Sam and Ken are wearing watches. None of the watches has the correct time. One watch says 4:00. One watch says 4:15. One wa
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Answer:
The 35-week gestation period baby has a z-score of 0.7.
The 41-week gestation period baby has a z-score of 0.89
Since the 41-week gestation period baby has a higher z-score, he weighs more relatively to his gestation period.
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
Which baby weighs more relative to the gestation period?
The baby with the higher z-score.
35-week gestation period baby weighs 2850 grams
Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2500 grams and a standard deviation of 500 grams
This means that Z is found when
The 35-week gestation period baby has a z-score of 0.7.
41-week gestation period baby weighs 3150 grams.
Babies born after a gestation period of 40 weeks have a mean weight of 2800 grams and a standard deviation of 395 grams.
This means that Z is found when
The 41-week gestation period baby has a z-score of 0.89
Since the 41-week gestation period baby has a higher z-score, he weighs more relatively to his gestation period.