Chamberlain College of Nursing

### Question Description

I donβt understand this Mathematics question and need help to study.

# Week 4 Discussion: Probability

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**Required Resources**

Read/review the following resources for this activity:

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

In your reference for this assignment, be sure to include both your text/class materials AND your outside reading(s).

**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.

- 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

- Answer the following questions about the information in your contingency table:
- If a person is randomly selected from the survey participants, what is the probability that the person will be left-handed?
- If you randomly choose a female from the people you surveyed, what is the probability that she is left-handed?
- What is the odds ratio of choosing a left-handed
**female**? - 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) |

- Probability of Green - (A+C)/(A+B+C+D): 70/130 = 54%
- Probability of Green Cat - A/(A+B): 40/60 = 67%
- Odds Ratio of Green Cat - (A/B)/(C/D) or AD/BC: (40*40)/(20*30) = 1600/600 = 2.67%
- Relative Risk of Green Cat - [A/(A+C)]/[B/(B+D)]: (40/70)/(20/60) = 17.14%

- 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?
- https://search-proquest-com.chamberlainuniversity.idm.oclc.org/nahs/docview/211689160/DB2AB8D1E63B4638PQ/4?accountid=147674 (Links to an external site.)
- https://search-proquest-com.chamberlainuniversity.idm.oclc.org/nahs/docview/1326739712/DB2AB8D1E63B4638PQ/10?accountid=147674 (Links 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.

**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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## Final Answer

Hey ,I have uploaded the draft because I need the access to the article and the title of the text book.Thank you

Running Head: PROBABILITY

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

ππ§π¬π°ππ« =

π

ππ ππ. ππππ%

ππ

PROBABILITY

3

2. If you randomly choose a female from the people you surveyed, wha...