Testing the Difference Between Two Means, accounting homework help

I need this in 24 hours.

There are 3 questions here but only 2 need to be answered. The first part “Testing the Difference…” has 2 bulleted questions, but only 1 of them need to be answered. When answering please make sure you use the heading of the question in your answer, so I know what answer goes to which question. Also, I will be using multiple plagiarism checkers, so please be sure that the work is 100% authentic.

Please make sure you are comfortable with both questions before agreeing to work on the questions.

“Testing the Difference Between Two Means.” (Note: Please respond to one [1] of the following two [2] bulleted items)

  • What two assumptions must be met when you are using the z test to test differences between two means? Under what circumstances can the sample standard deviations s1 and s2 be used in place of the population standard deviations σ1 and σ2 when conducting a hypothesis test to test the difference between 2 means.
  • Retired workers and disabled workers both receive Social Security benefits. What information would we need to test the claim that the difference in monthly benefits between the two groups is greater than $30 at the 0.05 level of significance? Write out the null and alternative hypotheses and explain the testing procedure.

“I Have a Plan” Please respond to the following:

Per the text, planning isn’t just what you do to go into business; it’s what you have to do to stay in business. Speculate on the planning mechanism(s) that you believe would work well for your NAB business if implemented properly. Provide a rationale for your response.