Find a confidence interval

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Reference no: EM131167465

Find a 95% confidence interval for the proportion of all bills paid within 15 days.

Find a 95% confidence interval for the difference between the proportion of large customers who pay within 15 days and the similar proportion of medium-size customers.

Find a 95% confidence interval for the difference between the proportion of medium-size customers who pay within 15 days and the similar proportion of small customers.

Reference no: EM131167465

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