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Basic Business Statistics
Quiz 5: Discrete Probability Distributions
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Question 81
Short Answer
The number of 911 calls in Butte,Montana,has a Poisson distribution with a mean of 10 calls a day.The probability of seven or eight 911 calls in a day is ________.
Question 82
Short Answer
TABLE 5-4 The following table contains the probability distribution for X = the number of traffic accidents reported in a day in Corvallis,Oregon.
-Referring to Table 5-4,the variance of the number of accidents is ________.
Question 83
Short Answer
An Undergraduate Study Committee of 6 members at a major university is to be formed from a pool of faculty of 18 men and 6 women.If the committee members are chosen randomly,what is the probability that all of the members will be men?
Question 84
Short Answer
An Undergraduate Study Committee of 6 members at a major university is to be formed from a pool of faculty of 18 men and 6 women.If the committee members are chosen randomly,what is the probability that precisely half of the members will be women?
Question 85
Short Answer
The number of power outages at a nuclear power plant has a Poisson distribution with a mean of 6 outages per year.The probability that there will be no more than 1 power outage in a year is ________.
Question 86
Short Answer
The Department of Commerce in a particular state has determined that the number of small businesses that declare bankruptcy per month is approximately a Poisson distribution with a mean of 6.4.Find the probability that exactly 5 bankruptcies occur next month.
Question 87
Short Answer
The number of power outages at a nuclear power plant has a Poisson distribution with a mean of 6 outages per year.The probability that there will be between 1 and 3 inclusive power outages in a year is ________.