Saint Elizabeth Confidence Interval for The Population Proportion Questions
Question Description
- Ms. Wilson is considering running for mayor of the town of Bear Gulch. Before completing the petitions, she decides to conduct a survey of voters in Bear Gulch. A sample of 200 voters reveals that 150 would support her in the November election. Develop a 99 percent confidence interval for the population proportion and interpret your finding.
- We want to estimate the population mean within 5, with a 95 percent level of confidence. The population standard deviation is estimated to be 10. How large a sample is required?
- At the time she was hired as a server Beth was told, “You can average more than $25 a day in tips.” Over the first 25 days she was employed at the restaurant, the mean daily amount of her tips was $24, with a standard deviation of $3. At the .05 significance level, can Beth conclude that she is earning an average of more than $25 in tips?
- show all work!!!
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