MAT 300 Week 9 Discussion MAT300 Week 9 Discussion MAT 300 Week 10 Discussion MAT300 Week 10 Discussion

MAT 300 Week 9 Discussion MAT300 Week 9 Discussion

You need two substantive posts to earn full credit on the discussion, one initial, one responding to your peers or your professor.

You have options for the initial post. Choose one from the list.

• Select a problem from the Correlation and Regression slice and provide a step-by-step solution.
• Select a problem from the slice that are open to you and provide detailed answers.

Indicate the name of the topic and the name of the slice on the Subject line so it is easier for others to follow.

Respond to your peers or the professor and tell the person whether his answer is correct or incorrect and explain why.  Please be aware the post needs to be substantive to earn full credit. Simply telling the person the answer is correct or incorrect is not substantive. To make it substantive, you may

• resolve the problem to show that you understand how to solve it, or
• point out where it goes wrong and make corrections, or
• ask the person to explain the steps that you do not understand.

You may post a problem you have trouble with. Your peers or your professor will help you solve it.

MAT 300 Week 10 Discussion MAT300 Week 10 Discussion

“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? Can the sample standard deviations s1 and s2 be used in place of the population standard deviations σ1 and σ2?
• 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 hypotheses and explain the testing procedure.