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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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RioNii RioNii
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Posts: 255
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A month 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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Anonymousbio_man
wrote...
#1
A month 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...
#2
A month ago
Sir what is the type of probability distribution shown here?
Anonymous
wrote...
#3
A month ago
Quote from: RioNii (A month ago)
Sir what is the type of probability distribution shown here?

Binomial model is used here
RioNii Author
wrote...
#4
A month ago
Thank you sir!!!
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