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(c) How many people would need to be studied to have 80% power under the assumptions in (a)? (Round your answer up to the nearest whole number.)

(c) How many people would need to be studied to have 80% power under the assumptions in (a)? (Round your answer up to the nearest whole number.)

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Diabetes Plasma-glucose levels are used to determine the presence of diabetes. Suppose the mean In(plasma-glucose) concentration (mg/dL) in 35- to 44-year-olds is 4.86 with standard deviation = 0.64. 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. USE SALT (a) 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 a = 0.05? 0.0500 (b) Answer (a) if the expected difference is 0.20 In units. 0.496 (c) How many people would need to be studied to have 80% power under the assumptions in (a)? (Round your answer up to the nearest whole number.) x 398
Transcribed Image Text:Diabetes Plasma-glucose levels are used to determine the presence of diabetes. Suppose the mean In(plasma-glucose) concentration (mg/dL) in 35- to 44-year-olds is 4.86 with standard deviation = 0.64. 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. USE SALT (a) 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 a = 0.05? 0.0500 (b) Answer (a) if the expected difference is 0.20 In units. 0.496 (c) How many people would need to be studied to have 80% power under the assumptions in (a)? (Round your answer up to the nearest whole number.) x 398
Diabetes Plasma-glucose levels are used to determine the presence of dlabetes. Suppose the mean In (plasma - glucose ) concentration (mg/dL) in 35 to 44-year-olds is 4.86 with standard deviation = 0.64. 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. (a) 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 = 0.05? (b) Answer (a) if the expected difference is 0.20 In units. (c) How many people would need to be studied to have 80% power under the assumptions in (a)? (Round your answer up to the nearest whole number.) Diabetes Plasma-glucose levels are used to determine the presence of diabetes. Suppose the mean In(plasma-glucose) concentration (mg/dL) in 35- to 44-year-olds is 4.86 with standard deviation 0.64. 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. USE SALT (a) 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 a 0.05? 0.0500 (b) Answer (a) if the expected difference is 0.20 In units. 0.496 (c) How many people would need to be studied to have 80% power under the assumptions in (a)? (Round your answer up to the nearest whole number.) x 398
Transcribed Image Text:Diabetes Plasma-glucose levels are used to determine the presence of dlabetes. Suppose the mean In (plasma - glucose ) concentration (mg/dL) in 35 to 44-year-olds is 4.86 with standard deviation = 0.64. 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. (a) 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 = 0.05? (b) Answer (a) if the expected difference is 0.20 In units. (c) How many people would need to be studied to have 80% power under the assumptions in (a)? (Round your answer up to the nearest whole number.) Diabetes Plasma-glucose levels are used to determine the presence of diabetes. Suppose the mean In(plasma-glucose) concentration (mg/dL) in 35- to 44-year-olds is 4.86 with standard deviation 0.64. 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. USE SALT (a) 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 a 0.05? 0.0500 (b) Answer (a) if the expected difference is 0.20 In units. 0.496 (c) How many people would need to be studied to have 80% power under the assumptions in (a)? (Round your answer up to the nearest whole number.) x 398
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