Q148 · Practice questionTechnology-activeSimple familiar3 marks
QUESTION 148 (3 marks)
In a random sample of people, support a proposal. Using , construct an approximate 95% confidence interval for the population proportion.
WORKED SOLUTION
3 marksPractice marking scheme
ANSWER
Approximately .
Worked solution
. The standard error is , so the margin of error is . The interval is approximately .
Calculates the sample proportion.
Calculates the margin of error.
States the confidence interval.
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