Due: 6/20, Wednesday below, choose a statistical dfrom the following list and ex

Question

Due: 6/20, Wednesday below, choose a statistical dfrom the following list and explain your choic . Not inferential statistics . Confidence interval for population mean (using t-table) . Confidence interval for population mean (using z-table) .Confidence interval for population proportion . Hypothesis test for population mean (using t-table) Hypothesis test for population mean (using z-table) Hypothesis test for population proportion . 1. (3 pts) A person wants to know whether the average gas price in his county is more than $2.2s. 2. (3 pts) A person wants to know the mean customer waiting time in a bank. Choose the statistical method and explain your choice, 3.(3 pts) An account of a company has all the employees' salary information. She wants to know the average salary of the employees 4. (3 pts) Each week the manager of a restaurant collect a sample of customers to make sure the average customer waiting time is less than 9 minutes. Assume the population standard deviation of waiting time is 1.4 minutes. 5. (3 pts) A hot satisfaction. el wants to do a survey to know whether they achieve the goal of 80% customer

Explanation / Answer

1. Hypothesis test for population mean (using t-table)

2. Confidence interval for population mean (using t table)

3. Hypothesis test for population mean (using t-table)

4. Hypothesis test for population mean (using z-table)

5. Hypothesis test for population proportion

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