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Hypothesis Test

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Instructions

Scenario (information repeated for deliverable 01, 03, and 04)

A major client of your company is interested in the salary distributions of jobs in the state of Minnesota that range from $30,000 to $200,000 per year. As a Business Analyst, your boss asks you to research and analyze the salary distributions. You are given a spreadsheet that contains the following information:

  • A listing of the jobs by title
  • The salary (in dollars) for each job
  1. In prior engagements, you have already explained to your client the basic statistics and discussed the importance of constructing confidence intervals for the population mean. Your client says that he remembers a little bit about hypothesis testing, but he is a little fuzzy. He asks you to give him the full explanation of all steps in hypothesis testing and wants your conclusion about two claims concerning the average salary for all jobs in the state of Minnesota.Background information on the DataThe data set in the spreadsheet consists of 364 records that you will be analyzing from the Bureau of Labor Statistics. The data set contains a listing of several job titles with yearly salaries ranging from approximately $30,000 to $200,000 for the state of Minnesota.What to submit your boss wants you to submit the spreadsheet with the completed calculations, answers, and analysis. 
  2. All math problems must be done using excel functions!
 
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hypothesis test

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Question

Hi. I need help with the following question:The Center for Disease Control takes periodic randomized

surveys to track health of Americans. In a survey of 4881 adults in 2007-2008, 1674 were obese (body mass index BMI ≥ 30). In a survey of 5181 adults in 2011-2012, 1808 were obese. Complete parts A, B, and C by hand.

a)  Estimate with 95% confidence the change in the population proportion from the first survey to the second survey that were obese and interpret the results.

b)  The standard error for this difference is quite small. What is the primary reason that causes the SE to be so small?

c) Conduct a hypothesis test for a difference betw

 
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