Chamberlain College of Nursing

### Question Description

I’m studying for my Statistics class and need an explanation.

**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?

## Final Answer

Please find answer.Let me know for any clarifications.Pleasure working with you.Good Bye.

Running head: HANDEDNESS

1

Handedness

Name

University Name

Course

November 20, 2019

HANDEDNESS

2

Statistical Analysis

A survey was conducted to determine the number of people who are either lefthanded or right-handed. The gender of the individuals were also recorded. The data is shown

in Appendix A. Based on the data, a cross-tabulation is shown below;

Female

Left-Handed

Right-Handed

Total

Male

4

8

12

Total

4

14

18

8

22

30

Answer...