A company is studying the number of monthly absences among its 127 employees. The following table shows the probability that people were absent 0, 1, 2, 3, 4 or 5 days, last month. Number of days absent Probability 0 0.63 10.18 2 0.09 3 0.05 4 0.03 5 0.02 a) Given the probability distribution, what is the probability that an employee will be absent 2 days during a month? ANSWER: b) What is the mean number of days absent? (2 decimal places): ANSWER: c) What is the variance of the number of days absent? (2 decimal places): ANSWER: d) What is the standard deviation of the days absent? (2 decimal places)

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