The website of the large coporation CorpPlus daims that 93% of the population of all employees say the corporation is a great place to work. You work for a competitor and think that this percentage is not a true indicator of CorpPlus's employee satisfaction. To test the claim from the website, you will survey a random sample of 70 employees from CorpPlus, and ask them whether they think the corporation is a great place to work. Follow the steps below to construct a 90% confidence interval for the population proportion of all employees who say the corporation Is a great place to work. Then state whether the confidence Interval you construct contradicts the website's claim. (If necessary, consult a list of formulas.) (a) Click on "Take Sample" to see the results from the random sample. Number Proportion Take Sample Says the corporation is a great place to work 56 0.8 Does not say the corporation is a great place to work 14 0.2 Enter the values of the sample size, the point estimate of the population proportion, and the critical value you need for your 90% confidence interval. (Choose the correct critical value from the table of critical values provided.) When you are done, select "Compute". Sample size: Standard error: values Point estimate: F0.005 2.576 Margin of error: Critical value: F0.010 2.326 F0.025 1.960 90% confidence interval: Compute 0.050 1.645 F0.100 1282 Based on your sample, graph the 90% confidence interval for the population proportion of all employees who say the corporation is a great place to work. (b) Enter the values for the lower and upper limits on the graph to show your confidence interval. For the point (•), enter the claim 0.93 from the website. 90% confidence Interval; 0.000 1,000 0500

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.