4. The World Health Organization reports that in a sample of 10,013 people globally, 9 in 31 people do not have access to drinking water free from contamination. a) Find a 95% confidence interval for the population proportion of people globally who do not have access to drinking water free from contamination. b) Find a 99% confidence interval for the population proportion of people globally who do not have access to drinking water free from contamination. c) The number of people used in the sample for part a was 10,013. Which of the following sample sizes would also satisfy normality: 15, 20, 30, 75, 200 when using a 95% level of confidence? You must show work for this problem. Explain your reasoning.

4. The World Health Organization reports that in a sample of 10,013 people globally, 9 in 31 people do not have access to drinking water free from contamination. a) Find a 95% confidence interval for the population proportion of people globally who do not have access to drinking water free from contamination. b) Find a 99% confidence interval for the population proportion of people globally who do not have access to drinking water free from contamination. c) The number of people used in the sample for part a was 10,013. Which of the following sample sizes would also satisfy normality: 15, 20, 30, 75, 200 when using a 95% level of confidence? You must show work for this problem. Explain your reasoning.

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

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4. The World Health Organization reports that in a sample of 10,013 people globally, 9 in 31 people
do not have access to drinking water free from contamination.
a) Find a 95% confidence interval for the population proportion of people globally who do not have
access to drinking water free from contamination.
b) Find a 99% confidence interval for the population proportion of people globally who do not have
access to drinking water free from contamination.
c) The number of people used in the sample for part a was 10,013. Which of the following sample
sizes would also satisfy normality: 15, 20, 30, 75, 200 when using a 95% level of confidence? You
must show work for this problem. Explain your reasoning.

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