Statistics: Chi Test for Association Between Variables

A researcher conducts a test on the effectiveness of a cholesterol treatment on 114 total subjects. Assuming the tails of distributions are normal distribution, is there evidence that the treatment is effective?
Cholesterol Decreased No Cholesterol Decrease Total
Treatment 38 18 56 
No treatment 30 28 58
Total 68 46 114
Case Assignment
1. Briefly describe the procedure for testing hypotheses.
2. Formulate the null and alternative hypotheses.
3. Determine the test statistic that you will use.
4. Calculate the p-value. Show your work.
5. Discuss whether there is enough evidence to reject the null hypothesis.
Assignment Expectations
Use the information in the modular background readings as well as resources you find through ProQuest or other online sources. Please be sure to cite all sources and provide a reference list at the end of the paper. Submit the paper as a Word document through the link provided for the assignment.
Length: 2–3 pages typed and double-spaced.
Your Case paper will be further evaluated based on the following criteria:
Precision (Excellent; Good; Average; Poor)
Each question and or assignment requirement is addressed in the paper.
Accuracy of your answers, key points and supporting discussion
Clarity (Excellent; Good; Average; Poor)
The paper is well organized, concise, reads clearly, and it is not confusing.
Breadth (Excellent; Good; Average; Poor)
The paper presents appropriate breadth covering the assignment questions/requirements.
Depth (Excellent; Good; Average; Poor)
Presents key points that lead to deeper matters and issues.
Integrates several points into coherent conclusions.
Critical Thinking (Excellent; Good; Average; Poor)
The paper demonstrates good understanding and synthesis of the module background material.
Logically incorporates key concepts presented in the background material into the overall analyses, key points and supporting discussions.
Presents well-reasoned conclusions and position as well as convincing arguments in support of the same.
Writing Mechanics
Grammar (Excellent; Good; Average; Poor)
Spelling (Excellent; Good; Average; Poor)
Vocabulary (Excellent; Good; Average; Poor)
Referencing (Excellent; Good; Average; Poor)
Additional considerations to keep in mind while working on your Case Assignments:
Originality and Use of directly quoted material
The purpose of each assignment is for you to present your understanding and synthesis of the background material and key concepts. Accordingly, this must be accomplished substantially in your own words.
Use directly quoted material sparingly and only when preserving the exact words of an author is necessary. For purposes of this course, rarely should directly quoted material represent more than 5 percent to 10 percent of your entire case paper’s content. Composing a paper patched together from mostly quoted material is not acceptable.
Be sure to properly reference all directly quoted material and include the in-text citations. All paraphrased information also requires reference citations at the end of the paraphrased section.