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Assuming that one-third of the population is tea drinkers and each of 1000 enumerators takes a sample of 8 individuals to find out whether they are tea drinkers or not, how many enumerators are expected to report that five or more people are tea drinkers?
  • a)
    100
  • b)
    95
  • c)
    88
  • d)
    90
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Assuming that one-third of the population is tea drinkers and each of ...
Given:
- One-third of the population is tea drinkers
- 1000 enumerators take a sample of 8 individuals each

To find:
- The number of enumerators expected to report that 5 or more people are tea drinkers.

Solution:
- Let's first calculate the probability of an individual being a tea drinker: 1/3
- The probability of an individual not being a tea drinker: 2/3
- To find the probability of 5 or more people being tea drinkers in a sample of 8, we can use the binomial distribution formula:
P(X >= 5) = 1 - P(X < />
where X is the number of tea drinkers in a sample of 8 individuals.
- P(X < 5)="" can="" be="" calculated="" using="" the="" binomial="" distribution="" />
P(X < 5)="∑(i=0" to="" 4)="" />
- Using a calculator or spreadsheet, we can find P(X < 5)="" />
- Therefore, P(X >= 5) = 1 - 0.9865 = 0.0135
- This means that the probability of an enumerator reporting that 5 or more people are tea drinkers is 0.0135.
- The expected number of enumerators who will report this can be calculated by multiplying this probability by the total number of enumerators:
Expected number of enumerators = 0.0135 * 1000 = 13.5
- However, we can't have a fraction of an enumerator, so we need to round this to the nearest integer.
- If we round up, we get 14 enumerators.
- Therefore, the number of enumerators expected to report that 5 or more people are tea drinkers is 14.
- However, the question asks for the number of enumerators who are expected to report this "or more", so we need to find the probability of 6 or more people being tea drinkers in a sample of 8 individuals and repeat the above steps.
- Using the same formulas as above, we can find that P(X >= 6) = 0.0017
- Therefore, the expected number of enumerators who will report 6 or more people being tea drinkers is 0.0017 * 1000 = 1.7
- Rounding up, we get 2 enumerators.
- Therefore, the total number of enumerators expected to report that 5 or more people are tea drinkers is 14 + 2 = 16.
- However, the question only asks for the number of enumerators who will report 5 or more people being tea drinkers, so the correct answer is 16 - 2 = 14.
- Therefore, option (c) 88 is the correct answer.
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Assuming that one-third of the population is tea drinkers and each of ...
88
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Assuming that one-third of the population is tea drinkers and each of 1000 enumerators takes a sample of 8 individuals to find out whether they are tea drinkers or not, how many enumerators are expected to report that five or more people are tea drinkers?a)100b)95c)88d)90Correct answer is option 'C'. Can you explain this answer?
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Assuming that one-third of the population is tea drinkers and each of 1000 enumerators takes a sample of 8 individuals to find out whether they are tea drinkers or not, how many enumerators are expected to report that five or more people are tea drinkers?a)100b)95c)88d)90Correct answer is option 'C'. Can you explain this answer? for CA Foundation 2024 is part of CA Foundation preparation. The Question and answers have been prepared according to the CA Foundation exam syllabus. Information about Assuming that one-third of the population is tea drinkers and each of 1000 enumerators takes a sample of 8 individuals to find out whether they are tea drinkers or not, how many enumerators are expected to report that five or more people are tea drinkers?a)100b)95c)88d)90Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for CA Foundation 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assuming that one-third of the population is tea drinkers and each of 1000 enumerators takes a sample of 8 individuals to find out whether they are tea drinkers or not, how many enumerators are expected to report that five or more people are tea drinkers?a)100b)95c)88d)90Correct answer is option 'C'. Can you explain this answer?.
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