Questions from Engineering Statistics


Q: If the probability is 0.1 that a person will make

If the probability is 0.1 that a person will make a mistake on his or her state income tax return, find the probability that (a) four totally unrelated persons each make a mistake; (b) Mr. Jones and M...

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Q: A large industrial firm uses three local motels to provide overnight accommodations

A large industrial firm uses three local motels to provide overnight accommodations for its clients. From past experience it is known that 20% of the clients are assigned rooms at the Ramada Inn, 50%...

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Q: The probability that a patient recovers from a delicate heart operation is

The probability that a patient recovers from a delicate heart operation is 0.9. What is the probability that exactly 5 of the next 7 patients having this operation survive?

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Q: The probability that a patient recovers from a delicate heart operation is

The probability that a patient recovers from a delicate heart operation is 0.8. What is the probability that (a) exactly 2 of the next 3 patients who have this operation survive? (b) all of the next 3...

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Q: In a certain federal prison, it is known that 2/

In a certain federal prison, it is known that 2/3 of the inmates are under 25 years of age. It is also known that 3/5 of the inmates are male and that 5/8 of the inmates are female or 25 years of age...

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Q: From 4 red, 5 green, and 6 yellow apples,

From 4 red, 5 green, and 6 yellow apples, how many selections of 9 apples are possible if 3 of each color are to be selected?

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Q: From a box containing 6 black balls and 4 green balls,

From a box containing 6 black balls and 4 green balls, 3 balls are drawn in succession, each ball being replaced in the box before the next draw is made. What is the probability that (a) all 3 are the...

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Q: A shipment of 12 television sets contains 3 defective sets. In

A shipment of 12 television sets contains 3 defective sets. In how many ways can a hotel purchase 5 of these sets and receive at least 2 of the defective sets?

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Q: A certain federal agency employs three consulting firms (A, B

A certain federal agency employs three consulting firms (A, B, and C) with probabilities 0.40, 0.35, and 0.25, respectively. From past experience it is known that the probability of cost overruns for...

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Q: A manufacturer is studying the effects of cooking temperature, cooking time

A manufacturer is studying the effects of cooking temperature, cooking time, and type of cooking oil for making potato chips. Three different temperatures, 4 different cooking times, and 3 different o...

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