Suppose that in a large population, the proportion that is left-handed is p = 0.10. Suppose n = 20 people will be randomly selected and X = number of people in the sample who are left-handed. What probability model should be used to find the probability that X = 3?
A) Binomial
B) Normal
C) Uniform
D) Chi-square

Question

Quizplus · Accepted Answer

The binomial probability model is appropriate because we have a fixed number of independent trials (n = 20), each trial has only two possible outcomes (left-handed or not left-handed), and the probability of success (being left-handed, p = 0.10) is the same for each trial.

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