MATH 225N Week 4 Discussion Probability
University:
Chamberlain University
MATH 225N Week 4 Discussion Probability
Paper Instructions
Initial Post Instructions
Probability plays a major role in the medical community. Diagnoses are based on probabilities. They are really questions or “what if’s”, and are answered by the probability that the treatment will be the best for the ailment.
Let’s look at probability in terms of both the real world and the medical community.
1. Survey 30 people to find out if they are left-handed or right-handed, and use the following chart to create a contingency table with the information.
- Left handed
- Right handed
- Total
- Female
- Male
- Total
2. Answer the following questions about the information in your contingency table;
a. If a person is randomly selected from the survey participants, what is the probability that the person will be left-handed?
b. If you randomly choose a female from the people you surveyed, what is the probability that she is left-handed?
c. What is the odds ratio of choosing a left-handed female?
d. What is the relative risk of choosing a left-handed female?
Example
| Green | Blue | Total | |
| Cats | 40 (A) | 20 (B) | 60 (A+B) |
| Dogs | 30 (C) | 40 (D) | 70 (C+D) |
| Total | 70 (A+C) | 60 (B+D) | 130 (A+B+C+D) |
a. Probability of Green
(A+C)/(A+B+C+D) 70/130 = 0.54
b. Probability of Green Cat
A/(A+B) 40/60 = 0.67
c. Odds Ratio of Green Cat
(A/B)/(C/D) or AD/BC (4040)/(2030) = 1600/600 = 2.67
d. Relative Risk of Green Cat
[A/(A+C)]/[B/(B+D)] (40/70)/(20/60) = 1.71
3. Skim through at least one of the following articles on left-handed vs. right-handed people from the Chamberlain Library. Answer the following question How do the probabilities and percentages for your study compare to those in the study you read?
a.
- https //search-proquest-com.chamberlainuniversity.idm.oclc.org/nahs/docview/211689160/DB2AB8D1E63B4638PQ/4?accountid=147674Links to an external site.
b.
- https //search-proquest-com.chamberlainuniversity.idm.oclc.org/nahs/docview/1326739712/DB2AB8D1E63B4638PQ/10?accountid=147674Links to an external site.
Follow-Up Post Instructions
Respond to at least two peers or one peer and the instructor. Further the dialogue by providing more information and clarification.
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Sample Answer
We explore ( mathematical ) Probability this Week. This includes probability concepts, conditional probability, independence, dependence, event( s ), the concept of “mutually exclusive,” the concept of “complement,” the multiplication rule, and the addition rule.
Please don’t forget to use an “outside” resource as part of the content and documentation for your first Post – the Post which is due on or before Wednesday of the Week – the Post where you make the most major contribution to the Weekly discussion posting area and attempt to address the discussion prompts / cues for the Week. It could possibly include a web site that you discovered on the internet at large, so long as the web site is relevant and substantial and does not violate the Chamberlain University policy for prohibited web sites, and so forth. It could possibly include references / resources that you discover through making use of the online Chamberlain University Library ( please click Resources along the left and then click Library to discover the link to the Chamberlain University online Library ) . )
Check out the link below for some information about concepts such as independence, dependence, mutually exclusive, disjoint, complement, and conditional probability.
Link (Links to an external site.)Links to an external site.
This is one kind of an example of using an “outside” source / resource to add to what is revealed in our Weekly Lesson in Modules and in our Weekly text book reading.
Please don’t forget to look over the Graded Discussion Posting Rubric each Week to be certain that you are meeting all of the Frequency requirements as well as all of the Quality requirements for graded discussion posting each Week.
If you have any questions about anything, please do not hesitate to post in the Q & A Forum discussion posting area or to send me a direct e-mail message to CSmith10@chamberlain.edu
Thanks Friends and Good Luck ! Work hard and learn a lot !!
Sincerely, Mr. Smith Chamberlain University Math, Statistics, and Quantitative Research
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