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RioNii RioNii
wrote...
Posts: 266
Rep: 2 0
10 months ago
Instructions:
a) Identify the type of probability distribution shown in the problem: binomial, hypergeometric, poisson etc.
b) Identify the given in the problem.
c) Solve for the probability.

Problem:
1) According to a poll released by a global polling firm, 80% of Canadians believes that the government is handling the Covid-19 crisis "well". Let a random sample of 25 Canadians be selected. What is the probability that there are exactly 20 Canadians in the sample who believed that the government handles the crisis well?
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Answer verified by a subject expert
AnonymousAnonymous
wrote...
10 months ago
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Quote
According to a poll released by a global polling firm, 80% of Canadians believes that the government is handling the Covid-19 crisis "well". Let a random sample of 25 Canadians be selected. What is the probability that there are exactly 20 Canadians in the sample who believed that the government handles the crisis well?

Note: 80% means 4 out of 5.

n = 25
x = 20
p = 0.8
1 - p = 0.2

\(f\left(x=20\right)=C_r^n\times p^x\times \left(1-p\right)^{n-x}=C_{20}^{25}\times \left(0.8\right)^{20}\left(0.20\right)^{25-20}=0.196\ \Rightarrow \ 19.6\%\)
1

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RioNii Author
wrote...
10 months ago
Sir what is the type of probability distribution shown here?
Anonymous
wrote...
10 months ago
Sir what is the type of probability distribution shown here?

Binomial model is used here
RioNii Author
wrote...
10 months ago
Thank you sir!!!
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