A company sells printers with a mean life of 2 years (24 months) and a standard deviation of 4 months. The company will replace a printer if it is faulty within 12 months of sale. If they sell 10,000, how many can they expect to replace if life expectancy is normally distributed?

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Q: Suppose a population has a mean of 100 and a standard deviation of 15. If repeated samples of size…

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A: I am attaching image so that you understand each and every step.

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A: Thank you for posting this question ! You have correctly chosen that a z test needs to be performed…

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Q: An electrical appliance made by company A has an average life of 2500 hours, with a standard…

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Q: What is the standard deviation of the commuting time?

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A: Note : Since you have asked multiple questions, we will solve the first question for you. If you…