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Using all 1991 birth records in the computerized national birth certificate registry compiled by the National Center for Health Statistics (NCHS), statisticians Traci Clemons and Marcello Pagano found that the birth weights of babies in the United States are not symmetric ("Are babies normal?" The American Statistician, Nov 1999, 53:4). However, they also found that when infants born outside of the "typical" 37-43 weeks and infants born to mothers with a history of diabetes are excluded, the birth weights of the remaining infants do follow a Normal model with mean u = 3432 g and standard deviation o = born from 37 to 43 weeks whose mothers did not have a history of diabetes. 482 g. The following questions refer to infants %3D

Using all 1991 birth records in the computerized national birth certificate registry compiled by the National Center for Health Statistics (NCHS), statisticians Traci Clemons and Marcello Pagano found that the birth weights of babies in the United States are not symmetric ("Are babies normal?" The American Statistician, Nov 1999, 53:4). However, they also found that when infants born outside of the "typical" 37-43 weeks and infants born to mothers with a history of diabetes are excluded, the birth weights of the remaining infants do follow a Normal model with mean u = 3432 g and standard deviation o = born from 37 to 43 weeks whose mothers did not have a history of diabetes. 482 g. The following questions refer to infants %3D

Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
6th Edition
ISBN:9781337111348
Author:Bruce Crauder, Benny Evans, Alan Noell
Publisher:Bruce Crauder, Benny Evans, Alan Noell
Chapter5: A Survey Of Other Common Functions
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# 3 Question 5 <> Using all 1991 birth records in the computerized national birth certificate registry compiled by the National Center for Health Statistics (NCHS), statisticians Traci Clemons and Marcello Pagano found that the birth weights of babies in the United States are not symmetric ("Are babies normal?" The American Statistician, Nov 1999, 53:4). However, they also found that when infants born outside of the "typical" 37-43 weeks and infants born to mothers with a history of diabetes are excluded, the birth weights of the remaining infants do follow a Normal model with mean u = 3432 g and standard deviation o = 482 g. The following questions refer to infants born from 37 to 43 weeks whose mothers did not have a history of diabetes. %3D Compute the z-score of an infant who weighs 3687 g. (Round your answer to two decimal places.) I Approximately what fraction of infants would you expect to have birth weights between 3430 g and 4400 g? (Express your answer as a decimal, not a percent, and round to three decimal places.) Approximately what fraction of infants would you expect to have birth weights below 3430 g? (Express your answer as a decimal, not a percent, and round to three decimal places.) A medical researcher wishes to study infants with high birth weights and seeks infants with birth weights among the heaviest 10%. Above what weight must an infant's birth weight be in order for the infant be included in the study? (Round your answer to the nearest gram.) Question Help: D Video M Message instructor Submit Question 08
Transcribed Image Text:# 3 Question 5 <> Using all 1991 birth records in the computerized national birth certificate registry compiled by the National Center for Health Statistics (NCHS), statisticians Traci Clemons and Marcello Pagano found that the birth weights of babies in the United States are not symmetric ("Are babies normal?" The American Statistician, Nov 1999, 53:4). However, they also found that when infants born outside of the "typical" 37-43 weeks and infants born to mothers with a history of diabetes are excluded, the birth weights of the remaining infants do follow a Normal model with mean u = 3432 g and standard deviation o = 482 g. The following questions refer to infants born from 37 to 43 weeks whose mothers did not have a history of diabetes. %3D Compute the z-score of an infant who weighs 3687 g. (Round your answer to two decimal places.) I Approximately what fraction of infants would you expect to have birth weights between 3430 g and 4400 g? (Express your answer as a decimal, not a percent, and round to three decimal places.) Approximately what fraction of infants would you expect to have birth weights below 3430 g? (Express your answer as a decimal, not a percent, and round to three decimal places.) A medical researcher wishes to study infants with high birth weights and seeks infants with birth weights among the heaviest 10%. Above what weight must an infant's birth weight be in order for the infant be included in the study? (Round your answer to the nearest gram.) Question Help: D Video M Message instructor Submit Question 08
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