Using the same data set and variables for your selected topic, add the following information to your analysis:
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?
Find the best point estimate of the population mean.
Construct two confidence intervals for the population mean: a 95% confidence interval and a 99% confidence interval. Assume that your data is normally distributed and the population standard deviation is unknown.
Please show your work for the construction of these confidence intervals and be sure to format your equations to fit the appropriate form (may need editing here).
Write a paragraph that correctly interprets the confidence intervals in context of your selected topic.
Compare and contrast your findings for the 95% and 99% confidence intervals.
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.2
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MAT 211 Lessons Rubrics
Mathematical Concepts.
Explanation shows complete understanding of the mathematical concepts used to solve the problem(s).
13points
Explanation shows substantial understanding of the mathematical concepts used to solve the problem(s).
10points
Explanation shows some understanding of the mathematical concepts needed to solve the problem(s).
8points
Explanation shows very limited understanding of the underlying concepts needed to solve the problem(s) OR is not written.
5points
Not Present
0points
Mathematical Reasoning
Uses complex and refined mathematical reasoning.
13points
Uses effective mathematical reasoning
10points
Some evidence of mathematical reasoning.
8points
Little evidence of mathematical reasoning.
5points
Not Present
0points
Mathematical Errors
90-100% of the steps and solutions have no mathematical errors.
13points
Almost all (85-89%) of the steps and solutions have no mathematical errors.
10points
Most (75-84%) of the steps and solutions have no mathematical errors.
8points
More than 75% of the steps and solutions have mathematical errors.
5points
Not Present
0points
Introduction/Thesis
The introduction is inviting. It grabs the reader’s attention and compels him/her to read further. Engaging lead/hook.
13points
The introduction clearly states the main topic and previews the structure of the paper, but is not particularly inviting to the reader.
10points
The introduction states the main topic, but does not adequately preview the structure of the paper nor is it particularly inviting to the reader.
8points
There is no clear introduction of the main topic or structure of the paper.
5points
Not Present
0points
Content/Body Paragaphs/Evidence
There is one clear, well-focused conflict/problem to be resolved. Author uses dialogue, action, and descriiption to show not tell the story.
12points
Main idea is clear but the supporting information is general. More detail needed to “show not tell” the story.
10points
Main idea is somewhat clear but there is a need for more supporting information. Author mostly tells the story instead of showing it.
8points
The main idea is not clear. There is a seemingly random collection of information.
5points
Not Present
0points
Grammar/Punctuation/APA Style
Writer makes no errors in grammar or punctuation, so the paper is exceptionally easy to read. Follows APA style.
12points
Writer makes 1 or 2 errors in grammar or punctuation, but the paper is still easy to read. Missing one or two elements of APA style
10points
Writer makes a few errors in grammar and/or punctuation that catch the reader’s attention and interrupt the flow. Missing most APA formatting.
8points
Writer makes several errors in grammar and/or punctuation that catch the reader’s attention and greatly interrupt the flow. No APA style.
5points
Not Present
0points
Vocabulary/Spelling
Writer uses vivid words and phrases that linger or draw pictures in the reader’s mind, and the choice and placement of the words seems accurate, natural and not forced.
12points
Writer uses vivid words and phrases that linger or draw pictures in the reader’s mind, but occasionally the words are used inaccurately or seem overdone.
10points
Writer uses words that communicate clearly, but the writing lacks variety, punch or flair.
8points
Writer uses a limited vocabulary that does not communicate strongly or capture the reader’s interest. Jargon or clichés may be present and detract from the meaning.
5points
Not Present
0points
Conclusion
The conclusion is strong and leaves the reader with a feeling that they understand what the writer is “getting at.”
12points
The conclusion is recognizable and ties up almost all the loose ends. The “so what” a bit cliché.
10points
The conclusion is recognizable, but does not tie up several loose ends.
8points
There is no clear conclusion, the paper just ends.
5points
Not Present
