# A statistics professor receives an average of five e

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56. A statistics professor receives an average of five e-mail messages per day from students.Assume the number of messages approximates a Poisson distribution.What is the probability that on a randomly selected day she will have two messages?A. 0.0067B. 0.0014C. 0.420D. 0.084
57. A company is studying the number of monthly absences among its 125 employees. Thefollowing probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or5 days last month.What is the mean number of days absent?
Chapter 06 - Discrete Probability Distributions58. A company is studying the number of monthly absences among its 125 employees. Thefollowing probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or5 days last month.What is the variance of the number of days absent?
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59. A company is studying the number of monthly absences among its 125 employees. Thefollowing probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or5 days last month.Given the probability distribution, which of the following predictions is correct?
Chapter 06 - Discrete Probability Distributions60. A company is studying the number of monthly absences among its 125 employees. Thefollowing probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or5 days last month.What is the mode of the distribution?A. 0.72 daysB. 2.5 daysC. 0 daysD. 3 days
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61. A company is studying the number of monthly absences among its 125 employees. Thefollowing probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or5 days last month.What is the standard deviation of the number of days absent?

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Probability distribution, Probability theory, Binomial distribution, Discrete probability distribution