(Solved) MATH225 Week 4 Discussion : – Probability

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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. Answer the following questions about the information in your contingency table:
    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?


Hello instructor and class

As explained by Holmes, Illowsky and Dean (2017) probability is simply a mathematical description of the likelihood of an event occurring. In line with this I, took a random sample of 30 people in my neighborhood to find out if they were left-handed or right-handed. The information is displayed in the contingency table here below:

Table 1: Contingency table

  Left -handed Right-handed Total
Females 1 12 13
Males 2 15 17
Total 3 27 30

Probability of left-handed= (1+2)/ (1+12+2+15) = 3/30= 10%

Probability of a female choice from the group being a left-handed=……………………..

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