# Response/opinion to probability post | MATH 311 – Probability and Statistics I | Liberty University

“A contingency table provides a way of portraying data that can facilitate calculating probabilities (Holmes, A., Illowsky, B., & Dean, S. 2017)”. I was unable to survey half and half, however, I was pretty close. I learned that right handed people far outweighed left handed people.

Part 1: A survey of 30 people to find out if they are left-handed or right-handed

Table 1: Contingency table

Left-handed     Right-handed     Total

Female        5 (A)                 11 (B)                   16(A+B)

Male            3 (C)                 11(D)                    14 (C+D)

Total            8(A+C)              22(B+D)               30(A+B+D)

Part 2

A. If a person is randomly selected from the survey participants, what is the probability that the person will be left-handed?

Solution:

(A+C)/(A+B+C+D): 5/30 = 0.167

B. If you randomly choose a female from the people you surveyed, what is the probability that she is left-handed?

Solution:

A/(A+B): 5/16 = 0.313

C. What is the odds ratio of choosing a left-handed female?

Solution

PROBABILITY 3 AD/BC: (5*11)/(11*3) = 55/33 = 1.667

D. What is the relative risk of choosing a left-handed female?

Solution

[A/(A+C)]/[B/(B+D)]: (5/8)/(11/22) = 0.625

Part 3:

According to Orr (2001), the percentage of left-handed people ranges between 10% and 13% of the world population. At one time, being left handed was often treated as a disorder. Teachers and parents would force children to transition into using their right hands.

References

Orr, T. (2017). Being a lefty is all right. Current Health, 28(2), 12-13

Holmes, A., Illowsky, B., & Dean, S. (2017). Introductory business statistics. OpenStax. https://openstax.org/details/books/introductory-business-statistics

## Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
\$26
The price is based on these factors:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
Paper format
• 275 words per page
• 12 pt Arial/Times New Roman
• Double line spacing
• Any citation style (APA, MLA, Chicago/Turabian, Harvard)

# Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

### Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

### Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

### Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.