Example 171.5: A manager is worried about hiring older workers because he fears that they may be more likely to call out sick. He decides to look at the attendance records for sample of employees from the previous year. The data is given below. Find a 95% confidence interval for the average number of sick days used by a 53 year old employee.

Employee Age	18	28	38	48	58
Sick Days Last Year	15	12	9	5	2

S = 0.31623

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Example 171.5

Sample Exams