QCEVault

Interval estimates for proportions — Question 199

Original QCE Vault practice · 4 marks

Q199 · Practice questionTechnology-freeComplex familiar4 marks

QUESTION 199 (4 marks)

Five confidence intervals, A–E, are shown together with the true population proportion p=0.60p=0.60.
(a) Identify the intervals that do not contain pp.
(b) Explain the meaning of a 95% confidence level in the context of repeated random sampling.
Five horizontal confidence intervals labelled A to E with a dashed vertical line at the true proportion p equals 0.60.
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