In an experiment, there are n independent trials. For each trial, there are thre
ID: 3368592 • Letter: I
Question
In an experiment, there are n independent trials. For each trial, there are three outcomes, A, B, and C. For each trial, the probability of outcome A is 0.70; the probability of outcome B is 0.10; and the probability of outcome C is 0.20. Suppose there are 10 trials.
(a) Can we use the binomial experiment model to determine the probability of four outcomes of type A, five of type B, and one of type C? Explain.
Yes. Each outcome has a probability of success and failure.
Yes. A binomial probability model applies to three outcomes per trial.
No. A binomial probability model applies to only two outcomes per trial.
No. A binomial probability model applies to only one outcome per trial.
(b) Can we use the binomial experiment model to determine the probability of four outcomes of type A and six outcomes that are not of type A? Explain.
Yes. Assign outcome B to "success" and outcomes A and C to "failure."
Yes. Assign outcome A to "success" and outcomes B and C to "failure."
No. A binomial probability model applies to only two outcomes per trial.
Yes. Assign outcome C to "success" and outcomes A and B to "failure."
What is the probability of success on each trial?
Explanation / Answer
(a)
Correct option : No. A binomial probability model applies to only two outcomes per trial.
Reason : One of the key assumption of binomial distribution is that "There are two and only two outcomes, labelled as "success" and "failure". The probability of outcome "success" is the same across the n trials."
(b)
Correct option : Yes. Assign outcome A to "success" and outcomes B and C to "failure."
Reason : In this case there will be only two outcomes :
1. Outcome of type A
2. Outcome not of type A
Hence, the assumption is satisfied, we can use the binomial distribution.
Probability of success on each trial = Probability of outcome A = 0.70
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