02 Oct Writer Choice
42710Lesson 7 Course Project
This week you will begin working on Phase 2 of your course project.
Use the same scenario and data set from Phase 1. *** ( Scenario attached bellow – browse)
Create a new submission for this assignment (do not include the work you did for Phase 1 in your assignment submission).
Your paper should have the following sections:
1. Point vs. Interval Estimation
Here you will discuss the importance of constructing confidence intervals for the population mean. You want to be sure to address these questions:
• What are confidence intervals?
• What is a point estimate?
• What is the best point estimate for the population mean? Explain why it is the best.
• Why do we need confidence intervals?
2. Mean Estimation
First clearly give the best point estimate for the population mean the data was drawn from.
Next you will construct two confidence intervals: a 95% confidence interval and a 99% confidence interval.
Bear in mind that the population standard deviation is unknown, but you may assume that the population is approximately normally distributed.
*Please show your work for the construction of these confidence intervals.
*If you used technology or a calculator please explain what you used and how you got your intervals.
3. Interpretation and Conclusion
Write a paragraph that correctly interprets the confidence intervals in context of your selected topic. You should use the standard language we always use when interpreting a confidence interval in plain English (or something close to it). Compare and contrast your findings for the 95% and 99% confidence intervals. Did you notice any changes in your interval estimate? Be specific.
*What conclusion(s) can be drawn about your interval estimates when the confidence level is increased?
*Explain why you draw this conclusion.
Be sure to number each section in your paper using the same numbers as above. Remember that this should read like a paper, not a series of bullet points. If I was your supervisor, submit the paper as you would an analysis/report to your boss.
It should be neat and professionally formatted.
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