Suppose that a municipality creates a survey to find out how satisfied its residents are with the services provided by the city.The respondents are asked to rank their satisfaction on a scale of one to five, with one being "very dissatisfied" and five being"very satisfied". The municipality randomly selects 5000 of its 100,000 residents to complete the survey.The municipality plans to use the survey results to create a 99% large-sample z-confidence interval for the residents'satisfaction score.Complete the following flowchart to determine if all of the requirements for constructing a large-sample z-confidence intervalfor a proportion have been met. If your answer is no for any requirement, leave the boxes below that requirement unanswered.Is the sample a simple randomsample from a large population?NoStop. Requirementsare not met.Is the parameter of interest categoricalwith two possible outcomes?NoStop. Requirementsare not met.YesyesNoStop. Requirementsare not met.Answer BankAre there enough successesand failures in the sample?YesnoYesUse a large sampleconfidence interval.

The Z-test for proportion is a statistical test used to determine whether a sample proportion is…

Answered: Suppose that a municipality creates a…

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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A credit score is used by credit agencies (such as mortgage companies and banks) to assess the creditworthiness of individuals. Values range from 300 to 850, with a credit score over 700 considered to be a quality credit risk. According to a survey, the mean credit score is 708.5. A credit analyst wondered whether high-income individuals (incomes in excess of $100,000 per year) had higher credit scores. He obtained a random sample of 43 high-income individuals and found the sample mean credit score to be 723.3 with a standard deviation of 84.6. Conduct the appropriate test to determine if high-income individuals have higher credit scores at the a = 0.05 level of significance. State the null and alternative hypotheses. Ho: H (Type integers or decimals. Do not round.) Identify the t-statistic. to = (Round to two decimal places as needed.) Identify the P-value. P-value = (Round to three decimal places as needed.) Make a conclusion regarding the hypothesis. the null hypothesis. There…
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