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SAMPLE SIZE DETERMINATION

SAMPLE SIZE DETERMINATION

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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SAMPLE SIZE DETERMINATION Solve the following. lar brand of coffee contains the average of dard deviation of 1. 110mg of caffeine per 20mg. Aldrin wants + vestigate same to estimate the true pop on mean caffeine conten correct to within ng adopting 95% confidence. How many cups ne same brand of coffee does he need for a sample? 2. Obesity is defined as a body mass index (BMI) of 30 kg/m² or more. A 95% confidence interval for the percentage of U.S. adults aged 20 years and over who were obese was found to be 22.4 to 23.5%. What was the sample size? 3. A federal report indicated that 27% of children ages 2 to 5 years had a good diet-an increase over previous years. How large a sample is needed to estimate the true proportion of children with good diets within 2% with 95% confidence?
Transcribed Image Text:SAMPLE SIZE DETERMINATION Solve the following. lar brand of coffee contains the average of dard deviation of 1. 110mg of caffeine per 20mg. Aldrin wants + vestigate same to estimate the true pop on mean caffeine conten correct to within ng adopting 95% confidence. How many cups ne same brand of coffee does he need for a sample? 2. Obesity is defined as a body mass index (BMI) of 30 kg/m² or more. A 95% confidence interval for the percentage of U.S. adults aged 20 years and over who were obese was found to be 22.4 to 23.5%. What was the sample size? 3. A federal report indicated that 27% of children ages 2 to 5 years had a good diet-an increase over previous years. How large a sample is needed to estimate the true proportion of children with good diets within 2% with 95% confidence?
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