n a company, a random sample of 30 working women with children showed that they were absents from work an average of 12 days per year with a standard deviation of 3.6 days. (a) Provide a 99% confidence interval for the average number of days absent per year for the entire working mothers in the company. (b) If a statistician constructed a thousand of these 99% confidence intervals over his/her lifetime, what percentage he/she would miss the target and how do you call it?

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