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Chamberlain College Week 4 Probability Theory Discussion

Chamberlain College of Nursing

### Question Description

I don’t understand this Mathematics question and need help to study.

# Week 4 Discussion: Probability

Required Resources

Read/review the following resources for this activity:

• OpenStax Textbook: Chapter 2, 3
• Lesson
• Minimum of 1 scholarly source

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

1. If a person is randomly selected from the survey participants, what is the probability that the person will be left-handed?
2. If you randomly choose a female from the people you surveyed, what is the probability that she is left-handed?
3. What is the odds ratio of choosing a left-handed female?
4. 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)
1. Probability of Green - (A+C)/(A+B+C+D): 70/130 = 54%
2. Probability of Green Cat - A/(A+B): 40/60 = 67%
3. Odds Ratio of Green Cat - (A/B)/(C/D) or AD/BC: (40*40)/(20*30) = 1600/600 = 2.67%
4. Relative Risk of Green Cat - [A/(A+C)]/[B/(B+D)]: (40/70)/(20/60) = 17.14%
1. 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?

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.

Writing Requirements

• Minimum of 3 posts (1 initial & 2 follow-up)
• APA format for in-text citations and list of references

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Discussion Reference ...
Purchase answer to see full attachment Student has agreed that all tutoring, explanations, and answers provided by the tutor will be used to help in the learning process and in accordance with Studypool's honor code & terms of service. Hey ,I have uploaded the draft because I need the access to the article and the title of the text book.Thank you

1

Probability
Name
Institution

PROBABILITY

2
Probability

Probability theory is a very crucial subject and forms the basis of statistical theory and its
application. Its application include insurance options, sports strategies, and weather forecasts,
making business, games and recreational activities. In real life the probability as well as the ability
to understand and estimate the likelihood of an event to happen are very crucial. On this discussion
post we will consider a survey of 30 people and find out the number of left handed and right handed
to construct a contingency table.
From a survey of 18 men and 12 women, it was found that 3 out of the 18 men were lefthanded. Also, 1 out of the 12 women was left-handed. The contingency table was created as shown
below.
Male

Female

Total

Left-handed

3 (A)

1 (C )

4

Right-

15(B)

11 (D )

26

18

12

30

handed
Total

Questions:
1. If a person is randomly selected from the survey participants, what is the probability that
the person will be left-handed?
Solution
P(Left) =

A+C
4
2
=
=
A + B + C + D 30 15
𝐀𝐧𝐬𝐰𝐞𝐫 =

𝟐
𝒐𝒓 𝟏𝟑. 𝟑𝟑𝟑𝟑%
𝟏𝟓

PROBABILITY

3

2. If you randomly choose a female from the people you surveyed, wha... achiaovintel (7899)
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