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The sample proportion is written p' = x/n. What do x and n represent in this formula?
Ax is the sample size, n is the number of successes
Bx is the number of successes, n is the sample size
Cx is the confidence level, n is the margin of error
Dx is the population proportion, n is the sample proportion
Answer & Solution
Correct answer: B. x is the number of successes, n is the sample size
1. p' is defined as the estimated proportion of successes, serving as a point estimate for the true proportion p.
2. It is computed as p' = x/n.
3. Here x is the number of successes observed, and n is the total sample size.
4. Options C and D swap in confidence level, margin of error, or the true population proportion, none of which x and n represent.
_Source: OpenStax Introductory Statistics (CC BY 4.0), Ch 8 "Confidence Intervals", section 8.3 A Population Proportion_
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