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Category > Statistics Posted 11 Jun 2017 My Price 4.00

Normal approximation

Normal approximation

The owner of a new apartment building must install 25 water heaters. From past experience in other apartment buildings, she knows that Quick Hot is a good brand. A Quick Hot heater is guaranteed for 5 years only, but from the owner’s past experience, she knows that the probability it will last 10 years is 0.25.

(a) What is the probability that 8 or more of the 25 water heaters will last at least 10 years? Define success to mean a water heater that lasts at least 10 years.

(b) How does this result compare with the result we can obtain by using the formula for the binomial probability distribution with  n = 25 and p = 0.25?

(c) How do the results of parts (a) and (b) compare?

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Alpha Geek
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Status NEW Posted 11 Jun 2017 09:06 AM My Price 4.00

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file 1497172022-Answer.docx preview (97 words )
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