Refer to the previous exercise. At the Inference for a Proportion applet at www.artofstat.com/webapps. html, enter 0

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Refer to the previous exercise. At the Inference for a Proportion applet at www.artofstat.com/webapps.

html, enter 0 successes for n = 20. Click on Confidence Interval for type of inference.Why are the reported standard error and confidence interval not sensible?

Clicking on the Agresti–Coull adjustment (introduced on page 126) gives a sensible alternative to the score confidence interval.

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