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3/23/20 11:10 PM

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Part 1

Question 1

 Left-hand Right-hand Sum

Female 4 9 13

Male 5 12 17

Total 9 21 30

Question 2

 P (left hand individual)

Thus, 9/30

= 0.3

 Probability of a female individual being left-handed

P (left hand female) = 4/13

= 0.3

 The odds ratio for selecting a left-hand female would be thus:

Odds Ratio (left hand female) = (4*4)/ (9*5)

= 16/45

= 0.36

Equivalent to thirty six percent

 The relative risk of selecting a left-handed female would be:

Relative risk (left-handed female) = (4/4+5)/ (9/9+12)

= 1.037

Equivalent to ten percent

Part 2

 Green probability



Equivalent to fifty four percent.

 Green cat probability



Equivalent to sixty seven percent.

 Odds Ratio of Green Cat

(A/B)/(C/D) = AD/BC:

(40 40)/ (20"30)

= 1600/600


The odds ratio of a green cat is three percent.



= 17.15

Part 3

Probability of right-handed people versus the left-hand people

According to studies from other scholars. There is an insignificant number of left-handed people. This is due to the cultural disposition of people around the world. Many families are acquainted to using their right hands. Nevertheless, it is also argued that the brain also influences the usage of the hands (chamberlain university, 2020). Therefore, the left-handed persons are using more of their left-hand side of the brain.

This argument is also supported by the American Scientific research group. They are of the view that seventy percent of the population is left-handed (chamberlain university, 2020). The result is true from the empirical evidence that has been developed from the study.


chamberlain university. (2020). Probability of left- and right-hand people. Retrieved from Accessed on March 23, 2020.