Questions from Business Statistics


Q: A market research firm conducts telephone surveys with a 40% historical

A market research firm conducts telephone surveys with a 40% historical response rate. What is the probability that in a new sample of 400 telephone numbers, at least 150 individuals will cooperate an...

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Q: Advertisers contract with Internet service providers and search engines to place ads

Advertisers contract with Internet service providers and search engines to place ads on websites. They pay a fee based on the number of potential customers who click on their ad. Unfortunately, click...

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Q: The proportion of individuals insured by the All-Driver Automobile Insurance

The proportion of individuals insured by the All-Driver Automobile Insurance Company who received at least one traffic ticket during a five-year period is .15. a. Show the sampling distribution of p i...

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Q: PBS News Hour reported in 2014 that 39.4% of

PBS News Hour reported in 2014 that 39.4% of Americans between the ages of 25 and 64 have at least a two-year college degree (PBS website). Assume that 50 Americans between the ages of 25 and 64 are s...

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Q: Cars arrive at a car wash randomly and independently; the probability

Cars arrive at a car wash randomly and independently; the probability of an arrival is the same for any two time intervals of equal length. The mean arrival rate is 15 cars per hour. What is the proba...

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Q: A new automated production process averages 1.5 breakdowns per day

A new automated production process averages 1.5 breakdowns per day. Because of the cost associated with a breakdown, management is concerned about the possibility of having three or more breakdowns du...

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Q: A regional director responsible for business development in the state of Pennsylvania

A regional director responsible for business development in the state of Pennsylvania is concerned about the number of small business failures. If the mean number of small business failures per month...

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Q: Busiest North American Airports. Based on the total passenger traffic,

Busiest North American Airports. Based on the total passenger traffic, the airports in the following list are the 20 busiest airports in North America in 2018 (The World Almanac). a. Which is busies...

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Q: Customer arrivals at a bank are random and independent; the probability

Customer arrivals at a bank are random and independent; the probability of an arrival in any one-minute period is the same as the probability of an arrival in any other one-minute period. Answer the f...

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Q: A deck of playing cards contains 52 cards, four of which

A deck of playing cards contains 52 cards, four of which are aces. What is the probability that the deal of a five-card poker hand provides a. A pair of aces? b. Exactly one ace? c. No aces? d. At lea...

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