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The negative effects of ambient air pollution on children's lung function has been well established, but less research is available about the impact of indoor air pollution. The authors of an article investigated the relationship between indoor air-pollution metrics and lung function growth among children ages 6-13 years living in four Chinese cities. For each subject in the study, the authors measured an important lung-capacity index knovwn as FEV,, the forced volume (in ml) of air that is exhaled in 1 second. Higher FEV, values are associated with greater lung capacity. Among the children in the study, 514 came from households that used coal for cooking or heating or both. Their FEV, mean was 1427 with a standard deviation of 327. (A complex statistical procedure vas used to show that burning coal had a clear negative effect on mean FEV, levels.) (a) Calculate and interpret a 95% (two-sided) confidence interval for true average FEV, level in the population of all children from which the sample was selected. (Round your answers to one decimal place.)

The negative effects of ambient air pollution on children's lung function has been well established, but less research is available about the impact of indoor air pollution. The authors of an article investigated the relationship between indoor air-pollution metrics and lung function growth among children ages 6-13 years living in four Chinese cities. For each subject in the study, the authors measured an important lung-capacity index knovwn as FEV,, the forced volume (in ml) of air that is exhaled in 1 second. Higher FEV, values are associated with greater lung capacity. Among the children in the study, 514 came from households that used coal for cooking or heating or both. Their FEV, mean was 1427 with a standard deviation of 327. (A complex statistical procedure vas used to show that burning coal had a clear negative effect on mean FEV, levels.) (a) Calculate and interpret a 95% (two-sided) confidence interval for true average FEV, level in the population of all children from which the sample was selected. (Round your answers to one decimal place.)

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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**Question:** (b) Suppose the investigators had made a rough guess of 330 for the value of *s* before collecting data. What sample size would be necessary to obtain an interval width of 50 ml for a confidence level of 95%? (Round your answer up to the nearest whole number.) [Input Box] children
Transcribed Image Text:**Question:** (b) Suppose the investigators had made a rough guess of 330 for the value of *s* before collecting data. What sample size would be necessary to obtain an interval width of 50 ml for a confidence level of 95%? (Round your answer up to the nearest whole number.) [Input Box] children
The negative effects of ambient air pollution on children's lung function have been well established, but less research is available about the impact of indoor air pollution. The authors of an article investigated the relationship between indoor air-pollution metrics and lung function growth among children ages 6-13 years living in four Chinese cities. For each subject in the study, the authors measured an important lung-capacity index known as FEV₁, the forced volume (in ml) of air that is exhaled in 1 second. Higher FEV₁ values are associated with greater lung capacity. Among the children in the study, 514 came from households that used coal for cooking or heating or both. Their FEV₁ mean was 1427 with a standard deviation of 327. (A complex statistical procedure was used to show that burning coal had a clear negative effect on mean FEV₁ levels.) (a) Calculate and interpret a 95% (two-sided) confidence interval for true average FEV₁ level in the population of all children from which the sample was selected. (Round your answers to one decimal place.) ( [blank] , [blank] )
Transcribed Image Text:The negative effects of ambient air pollution on children's lung function have been well established, but less research is available about the impact of indoor air pollution. The authors of an article investigated the relationship between indoor air-pollution metrics and lung function growth among children ages 6-13 years living in four Chinese cities. For each subject in the study, the authors measured an important lung-capacity index known as FEV₁, the forced volume (in ml) of air that is exhaled in 1 second. Higher FEV₁ values are associated with greater lung capacity. Among the children in the study, 514 came from households that used coal for cooking or heating or both. Their FEV₁ mean was 1427 with a standard deviation of 327. (A complex statistical procedure was used to show that burning coal had a clear negative effect on mean FEV₁ levels.) (a) Calculate and interpret a 95% (two-sided) confidence interval for true average FEV₁ level in the population of all children from which the sample was selected. (Round your answers to one decimal place.) ( [blank] , [blank] )
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