Diabetes Plasma-glucose levels are used to determine the pres- ence of diabetes. Suppose the mean In (plasma-glucose) concentration (mg/dL) in 35- to 44-year-olds is 4.86 with standard deviation = 0.54. A study of 100 sedentary people in this age group is planned to test whether they have a higher or lower level of plasma glucose than the general population. 7.7 If the expected difference is 0.10 In units, then what is the power of such a study if a two-sided test is to be used with α =.05? 7.8 Answer Problem 7.7 if the expected difference is 0.20 In units. 7.9 How many people would need to be studied to have 80% power under the assumptions in Problem 7.7?
Diabetes Plasma-glucose levels are used to determine the pres- ence of diabetes. Suppose the mean In (plasma-glucose) concentration (mg/dL) in 35- to 44-year-olds is 4.86 with standard deviation = 0.54. A study of 100 sedentary people in this age group is planned to test whether they have a higher or lower level of plasma glucose than the general population. 7.7 If the expected difference is 0.10 In units, then what is the power of such a study if a two-sided test is to be used with α =.05? 7.8 Answer Problem 7.7 if the expected difference is 0.20 In units. 7.9 How many people would need to be studied to have 80% power under the assumptions in Problem 7.7?
MATLAB: An Introduction with Applications
6th Edition
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Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Transcribed Image Text:Diabetes
Plasma-glucose levels are used to determine the pres-
ence of diabetes. Suppose the mean In (plasma-glucose)
concentration (mg/dL) in 35- to 44-year-olds is 4.86 with
standard deviation = 0.54. A study of 100 sedentary people
in this age group is planned to test whether they have a
higher or lower level of plasma glucose than the general
population.
7.7 If the expected difference is 0.10 In units, then what is
the power of such a study if a two-sided test is to be used
with α = .05?
7.8 Answer Problem 7.7 if the expected difference is 0.20
In units.
7.9 How many people would need to be studied to have
80% power under the assumptions in Problem 7.7?
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