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Q1) Number of pages printed before replacing cartridge in laser printer is normally distributed with a mean of 11,500 pages and standard deviation of 800 pages. A new cartridge has just been installed.
a) Determine the probability that printer produces more than 12,000 pages before this cartridge should be replaced?
b) Find out the probability that printer produces fewer than 10000 pages?
2) Top- selling Red and Voss tire is rated 70,000 miles, that means nothing. In fact, distance the tires can run until they wear out is a normally distributed random variable with mean of 82,000 miles and standard deviation of 6,400 miles.
a) Determine the probability that tire wears out before 70,000 miles?
b) What is the probability that tire lasts more than 100,000 miles?
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Be certain to mention the direction of the relationship, the strength of the relationship, and whether our findings are statistically significant
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