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Explain why this study is not an experiment.  A. No treatment was imposed on the subjects to affect their IQ b. The study is an experiment but is not fully randomized, as VLBE males were selected.  c. The samples is a simple random sample of the populatjonn d. There is no control group

Explain why this study is not an experiment.  A. No treatment was imposed on the subjects to affect their IQ b. The study is an experiment but is not fully randomized, as VLBE males were selected.  c. The samples is a simple random sample of the populatjonn d. There is no control group

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
Section10.1: Measures Of Center
Problem 4GP
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Explain why this study is not an experiment. 
A. No treatment was imposed on the subjects to affect their IQ

b. The study is an experiment but is not fully randomized, as VLBE males were selected. 
c. The samples is a simple random sample of the populatjonn

d. There is no control group 

Infants weighing less than 1500 grams at birth are classed as "very low birth weight." Low birth weight carries many risks. IQ tests are designed to produce IQ scores varying Normally with standard deviation = 15. They are also scaled so that the mean score in a large population should be μ = 100. One study followed 113 male infants with very low birth weight to adulthood. At age 20, the mean IQ score for these men was x = 87.6. It is suspected that the very-low-birth-weight population has a mean IQ score less than 100. Studies of newborns often examine the sociodemographics of their mothers as well. Such studies show that babies are, for instance, more likely to be born to unmarried mothers and to mothers who did not very-low-birth-weight complete high school.
Transcribed Image Text:Infants weighing less than 1500 grams at birth are classed as "very low birth weight." Low birth weight carries many risks. IQ tests are designed to produce IQ scores varying Normally with standard deviation = 15. They are also scaled so that the mean score in a large population should be μ = 100. One study followed 113 male infants with very low birth weight to adulthood. At age 20, the mean IQ score for these men was x = 87.6. It is suspected that the very-low-birth-weight population has a mean IQ score less than 100. Studies of newborns often examine the sociodemographics of their mothers as well. Such studies show that babies are, for instance, more likely to be born to unmarried mothers and to mothers who did not very-low-birth-weight complete high school.
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