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 = 0.54
- Probability of Green Cat – A/(A+B): 40/60 = 0.67
- 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) = 1.71

- 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

**Grading**

This activity will be graded using the Discussion Grading Rubric. Please review the following link:

- Link (webpage): Discussion Guidelines

**Course Outcomes (CO): 6**

**Due Date for Initial Post: By 11:59 p.m. MT on Wednesday**

**Due Date for Follow-Up Posts: By 11:59 p.m. MT on Sunday**

# Solution:

Nurses rely on statistics to enhance the quality of care, improve patient outcomes, proof evidence-based practices, compare various interventions, and enhance cost-effectiveness of their practice. probability is one of the statistics we use. This statistical concept helps nurses predict or measure the prospects a given outcome(Holmes, Illowsky, & Dean, 2019). For example, nurses can use probability to predict the likelihood of a patient experiencing an adverse reaction following the administration of a given medicine. In this assignment, I was tasked with collecting data on lefthanded-ness from a sample of 30 persons. As shown in the results above, I found that one is 23% likely to randomly select a left-handed person from my sample. Conversely, the chosen research stipulates that left-handedness has a lesser probability of just 10% to 13% (2001). The difference in probability can be due to my use of a considerably small sample….P**lease click here to download at $5**