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grade 12 · STAT2-004

Interpret a confidence interval

Describe a plausible range for a population parameter without assigning probability to a fixed parameter.

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Show what I knowFresh problem · seed 75734364

A random sample estimates a population proportion as 68% with margin of error 7 percentage points. Which interpretation is appropriate?

61%68%75%± 7 points

Choose an answerEvery future sample proportion must lie from 61% to 75%.The interval from 61% to 75% is a plausible range for the population proportion.Exactly 68% of the population has the trait.The probability that this fixed population proportion changes is 7%.

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