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Project Part 3- Confidence Intervals
Project Part 3- Confidence Intervals
| ORDER # | 100215 |
| PAPER TYPE | MATH PROBLEMS |
| WRITING LEVEL | UNDERGRADUATE |
| WRITING STYLE | APA |
| # OF SOURCES | N/A |
| # OF QUESTIONS | 2 |
Based on the class sample, you will create a 95% confidence interval for the mean age and the proportion of males in the population of all online college students.
Note: The goal of the project is to practice making a confidence interval for a mean and proportion with real data. Do not worry about failed assumptions tests and do not make corrections for small sample size. Use primary methods described in text and used on homework.
Using the same excel sheet as last week, answer the following in the “week 5” tab:
- For the average age, form a 95% confidence interval:
o What distribution should be used?
o What is the critical value?
o What is the error bound?
o What is the lower bound?
o What is the upper bound?
o How do we interpret the results, in context of our study?
- For the proportion of males, form a 95% confidence interval:
o What distribution should be used?
o What is the critical value?
o What is the error bound?
o What is the lower bound?
o What is the upper bound?
o How do we interpret the results, in context of our study?
This assignment uses a grading rubric. Please ensure all criteria is met before submitting your paper.
Grading Rubric
| Excellent (4) | Good (3) | Needs Improvement (2) | Poor (1) | |
| Language/Spelling/ Grammar | Excel analysis has no errors and very few grammatical errors. Very well written and excellent use of statistical language. | Excel analysis has a few errors. Few grammatical errors that don’t affect meaning. Well written and use of statistical language is acceptable. | Excel analysis has some errors. Some grammatical errors but generally don’t affect meaning. Language is satisfactory overall but use of more appropriate statistical language is required. | Excel analysis has numerous punctuation or spelling errors. Numerous grammatical errors that affect meaning. Language used is unprofessional and not appropriate for statistical use. |
| Excel analysis Organization, Formulae and Formatting | Relevant sections, formulae are included, and each is organized effectively. Formatting is professional and consistent and includes all required elements. | Relevant sections, formulae are included but could be a little better organized. Formatting is acceptable and/or one or two required elements are missing. | Relevant sections, formulae are included but organization could be improved. Formatting is inconsistent and/or many elements are missing or not formatted appropriately. | Sections and formulae are missing and/or poorly organized. Formatting is messy and unprofessional. |
| Excel Analysis Relevance/Thinking | Excel Analysis is relevant comprehensive and detailed. Thinking and ideas are presented clearly, are engaging and thorough. | Excel Analysis is relevant and sufficient. Thinking and ideas are clear but could be expanded to be more thorough. | Excel Analysis is fairly relevant, basic and/or thinking and ideas lack some clarity and depth. | Excel Analysis is very basic and thinking and ideas are superficial and lack clarity. |
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