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1. Birth weights of babies in the United States can be modeled by a normal distribution with mean 3250 grams and standard deviation 550 grams. Those weighing less than 2500 grams are considered to be of low birth weight.

1. Birth weights of babies in the United States can be modeled by a normal distribution with mean 3250 grams and standard deviation 550 grams. Those weighing less than 2500 grams are considered to be of low birth weight.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 3GP
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The Normal Distribution on StatCrunch 1. Birth weights of babies in the United States can be modeled by a normal distribution with mean 3250 grams and standard deviation 550 grams. Those weighing less than 2500 grams are considered to be of low birth weight.
Transcribed Image Text:The Normal Distribution on StatCrunch 1. Birth weights of babies in the United States can be modeled by a normal distribution with mean 3250 grams and standard deviation 550 grams. Those weighing less than 2500 grams are considered to be of low birth weight.
(f) Data from the National Vital Statistics Report indicate that there were 3,880,894 births in the United States in 1997. A total of 291,154 babies were of low birth weight. Calculate the observed proportion and comment on how well your normal calculation from part(c) approximates this value. (g) From the same 1997 report, a total of 2,552,852 babies weighed between 3000 and 4000 grams. Calculate the observed proportion and comment on how well your normal calculation from part(e) approximates this value. The kh percentile of a distribution can also be found by using STAT E Calculators E Normal (h) How little would a baby have to weigh to be among the lightest 2.5% of all newborns? Start by sketching the curve and shading the appropriate region. (i) How much would a baby have to weigh to be among the heaviest 10% of all newborns? Start by sketching the curve and shading the appropriate region.
Transcribed Image Text:(f) Data from the National Vital Statistics Report indicate that there were 3,880,894 births in the United States in 1997. A total of 291,154 babies were of low birth weight. Calculate the observed proportion and comment on how well your normal calculation from part(c) approximates this value. (g) From the same 1997 report, a total of 2,552,852 babies weighed between 3000 and 4000 grams. Calculate the observed proportion and comment on how well your normal calculation from part(e) approximates this value. The kh percentile of a distribution can also be found by using STAT E Calculators E Normal (h) How little would a baby have to weigh to be among the lightest 2.5% of all newborns? Start by sketching the curve and shading the appropriate region. (i) How much would a baby have to weigh to be among the heaviest 10% of all newborns? Start by sketching the curve and shading the appropriate region.
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