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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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.