Determine the minimum sample size required when you want to be 99% confident that the sample mean is within one unit of the population mean ando = 17.2. Assume the population is normally distributed.A 99% confidence level requires a sample size of(Round up to the nearest whole number as needed.)

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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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Determine the minimum sample size required when you want to be 95% confident that the sample mean is within one unit of the population mean and σ=16.7. Assume the population is normally distributed. A 95% confidence level requires a sample size of ______. (Round up to the nearest whole number as needed.)
Determine the minimum sample size required when you want to be 99% confident that the sample mean is within one unit of the population mean and a = 15.4. Assume the population is normally distributed. A 99% confidence level requires a sample size of (Round up to the nearest whole number as needed.)
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A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 3 points with 99% confidence assuming s=17.8 based on earlier studies? Suppose the doctor would be content with 99% confidence. How does the decrease in confidence affect the sample size required? a. A 99% confidence level requires _______ subject. b. 90% confidence level requires ________ subject. c.How does the decrease in confidence affect the sample size required? a.Decreasing the confidence level decreases the sample size needed. b.Decreasing the confidence level increases the sample size needed. c.The sample size is the same for all levels of confidence.
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Determine the minimum sample size required when you want to be 90% confident that the sample mean is within one unit of the population mean and o = 11.3. Assume the population is normally distributed. A 90% confidence level requires a sample size of. (Round up to the nearest whole number as needed.)
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