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Suggested answer to exercise: Estimation, standard error and confidence intervals, 3

Question 3: How would the confidence interval change if 90% limits were used?

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Suggested answer

If 90% limits were used the confidence interval would be narrower
and fewer (90% rather than 95%) of confidence intervals from possible samples
would contain the population incidence.
Thus the estimated range of possible values would be narrower but there would
be more chance of being wrong.
(The 90% confidence limits would be 6.4 to 8.6%).

Back to Exercise: Estimation, standard error and confidence intervals.

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Last updated: 27 July, 2009.

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