# Statistics final stage

In this module you will submit Phase 5, the final phase, of your course project. For Phase 5 of your course project, you will want to review your instructor’s feedback from your Phase 4 submission and make any necessary corrections

Once you have made your corrections, you will make your final submission for the course project. Below is a summary of the expectations for Phase 5 of the course project:

1. Introduce your scenario and data set.
• Provide a brief overview of the scenario you are given above and the data set that you will be analyzing.
• Classify the variables in your data set.
• Which variables are quantitative/qualitative?
• Which variables are discrete/continuous?
• Describe the level of measurement for each variable included in your data set.
2. Discuss the importance of the Measures of Center and the Measures of Variation.
• What are the measures of center and why are they important?
• What are the measures of variation and why are they important?
3. Calculate the measures of center and measures of variation. Interpret your results in context of the selected topic.
• Mean
• Median
• Mode
• Midrange
• Range
• Variance
• Standard Deviation
4. Discuss the importance of constructing confidence intervals for the population mean.
• What are confidence intervals?
• What is a point estimate?
• What is the best point estimate for the population mean? Explain.
• Why do we need confidence intervals?
5. Based on your selected topic, evaluate the following:
• Find the best point estimate of the population mean.
• Construct a 95% confidence interval for the population mean. Assume that your data is normally distributed and Ïƒ is unknown.
• Please show your work for the construction of this confidence interval and be sure to use the Equation Editor to format your equations.
• Write a statement that correctly interprets the confidence interval in context of your selected topic.
6. Based on your selected topic, evaluate the following:
• Find the best point estimate of the population mean.
• Construct a 99% confidence interval for the population mean. Assume that your data is normally distributed and Ïƒ is unknown.
• Please show your work for the construction of this confidence interval and be sure to use the Equation Editor to format your equations.
• Write a statement that correctly interprets the confidence interval in context of your selected topic.
7. Compare and contrast your findings for the 95% and 99% confidence interval.
• Did you notice any changes in your interval estimate? Explain.

• What conclusion(s) can be drawn about your interval estimates when the confidence level is increased? Explain.

Discuss the process for hypothesis testing.

• Discuss the 8 steps of hypothesis testing?
• When performing the 8 steps for hypothesis testing, which method do you prefer; P-Value method or Critical Value method? Why?
1. Perform the hypothesis test.
• If you selected Option 1:
• Original Claim: The average salary for all jobs in Minnesota is less than \$65,000.
• Test the claim using Î± = 0.05 and assume your data is normally distributed and Ïƒ is unknown.
• Based on your selected topic, answer the following:
1. Write the null and alternative hypothesis symbolically and identify which hypothesis is the claim.
2. Is the test two-tailed, left-tailed, or right-tailed? Explain.
3. Which test statistic will you use for your hypothesis test; z-test or t-test? Explain.
4. What is the value of the test-statistic? What is the P-value?
5. What is the critical value?
6. What is your decision; reject the null or do not reject the null?
7. Explain why you made your decision including the results for your p-value and the critical value.
8. State the final conclusion in non-technical terms.
1. Conclusion
• Recap your ideas by summarizing the information presented in context of your chosen scenario.

I did not do the rough draft for phase four.

In this module, you will begin working on Phase 4 of your course project. For Phase 4 of your course project, you will want to review your instructor’s feedback from your Phase 1, Phase 2, and Phase 3 submissions to make any necessary corrections. Remember if you have questions about the feedback to ask your instructor for assistance.

Once you have made your corrections, you will compile your information from Phase 1, Phase 2, Phase 3 and your final conclusion into one submission and submit this as your rough draft for Phase 4 of the course project

Teachers feed back from the first 3 stages

Hello Monika,

You did an excellent job on your course project phase 1! You earned full credit by meeting all requirements. Your work demonstrated advanced understanding of descriptive statistics.

Course Project – Phase 1 Scoring Rubric:

Includes a clear and concise introduction for the selected topic and data set. Introduction includes all required elements as outlined in the assignment. (5/5)

Clearly discusses the importance of the measures of center and measures of variation. (5/5)

Correctly calculates and interprets the measures of center and measures of variation. (10/10)

Includes a clear and concise conclusion that summarizes the paper.(5/5)

Accurately uses APA formatting consistently throughout the paper. The equation editor was used to format all equations. (5/5)

Total 30/30

Phase 2

Thank you for constructing confidence intervals for the scenario 1. You discuss the importance of the confidence intervals(7/7), and accurately use APA formatting consistently throughout the paper and submit assignment on time. The equation editor was used to format all equations(6/6). But some calculates and interprets the 95% and 99% confidence intervals are not correct.

Please take a look at the following results(15/17):

Mean 62,339

Sample standard deviation s=19360

sample size n=350

degrees of freedom=n-1=349

95% confidence interval with  349 degrees of freedom

t=1.967

Margin error E=t*s/sqrt(n)=2035.296

confidence interval:60303.7 < mean <64373.3

phase 3

Thank you for performing the hypothesis test for the scenario 1. You clearly discuss the steps for hypothesis testing(10/10), and accurately use APA formatting consistently throughout the paper. The equation editor was used to format all equations(6/6).But some results in your hypothesis test are not correct. Please take a look at the following(10/14):

Mean 62,339

Sample standard deviation s=19,360

sample size n=350

degrees of freedom=n-1=349

H0 : μ = 65,000

H1 : μ < 65,000

Conduct the hypothesis test for the population mean μ, we use the t-statistic

t= -2.57

which follows a t-distribution with n-1=349 degrees of freedom.

The critical value is -1.649

Phase 4 was a rough draft for phase 5. Any questions please call me.

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