Sampling and Sampling Distributions

Problem-32: Sampling and Sampling Distributions

Jill Johnson, product manager for Southern Electric's smoke alarm, is concerned over recent complaints from consumer groups about the short life of the device.

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Problems: Sampling and Sampling Distributions

In a sample of 25 observations from a normal distribution with mean 98.6 and standard deviation 17.2...

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Mary Bartel, an auditor for a large credit card company, knows that, on average, the monthly balance...

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In a sample of 16 observations from a normal distribution with a mean of 150 and a variance of 256, ...

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In a sample of 19 observations from a normal distribution with mean 18 and standard deviation 4.8

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In a normal distribution with mean 56 and standard deviation 21, how large a sample must be taken so...

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In a normal distribution with mean 375 and standard deviation 48, how large a sample must be taken s...

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An astronomer at the Mount Palomar Observatory notes that during the Gemind meteor shower, an averag...

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The average cost of a studio condominium in the Cedar Lakes development is $62,000 and the standard ...

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Robertson Employment Service customarily gives standard intelligence and aptitude tests to all peopl...

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An oil refinery has backup monitors to keep track of the refinery flows continuously and to prevent ...

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A recent study by the EPA has determined that the amount of contaminants in Minnesota lakes (in part...

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Calvin Ensor, president of General Telephone Corp, is upset at the number of telephones produced by ...

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Clara Voyant, Whose job is predicting the future for her venture capital company, has just received ...

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Farmer Braun, Who sells grain to Germany, owns 60 acres of wheat fields. Based on past experience, h...

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A ferry carries 25 passengers. The weight of each passenger has a normal distribution with mean 168 ...

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From a population of 125 items with a mean of 105 and a standard deviation of 17,64 items were chose...

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Jonida Martinez, researcher for the Columbian Coffee Corporation, is interested in determining the r...

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From a population of 75 items with a mean of 364 and a variance of 18, 32 items were randomly select...

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Given a population of size N = 80 with a mean of 22 and a standard deviation of 3.2 what is the prob...

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For a population of size N = 80 with a mean of 8.2 and a standard deviation of 2.1, find the standar...

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Tread-On-Us has desgned a new tire, and they don't know what the average amount of tread life is goi...

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An underwater salvage team is preparing to explore a site off the coast of Florida where an entire f...

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An X-ray technician is taking readings from her machine to ensure that it adheres to federal safety ...

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Sara Gordon is heading a fund - raising drive for Milford College. She wishes to concentrate on the ...

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Davis Aircraft Co. is developing a new wing de-icer system, which it has installed on 30 commercial ...

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Food Place, a chain of 145 supermarkets, has been bought out by a larger nationwide supermarket chai...

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Miss Joanne Happ, chief executive officer of Southwestern Life & Surety Corp, wants to undertake a s...

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By reviewing sales since opening 6 months ago, a restaurant owner found that the average bill for a ...

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The U>S. Customs Agency routinely checks all passengers arriving from foreign countries as they ente...

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HAL Corporation manufactures large computer systems and has always prided itself on the reliability ...

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Members of the Organization for Consumer Action send more than 250 volunteers a day all over the sta...

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Jill Johnson, product manager for Southern Electric's smoke alarm, is concerned over recent complain...

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Seventy data clerks at the Department of Motor Vehicles make an average of 18 errors per day, normal...

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