5. In previous years the average number of patients per hour at a hospital emergency room on weekends exceeded the average on weekdays by 6.3 visits per hour. A hospital administrator believes that the current weekend mean exceeds the weekday mean by fewer than 6.3 hours. Construct the 99% confidence interval for the difference in the population means based on the folløwing data, derived from a study in which 30 weekend and 30 weekday one-hour periods were randomly selected and the number of new patients in each recorded. Weekends 30 13.8 3.1 Weekdays 30 8.6 2.7 %24

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