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The average life of a smart TV before replacement is 14 years with a standard deviation of 0.25 years. Let x be the age at

The average life of a smart TV before replacement is 14 years with a standard deviation of 0.25 years. Let

x be the age at which a smart TV is replaced, assume that x has a normal distribution. Suppose that a

company guarantees smart TV which breaks while under guarantee and replace with a new smart TV.

However, the company does not want to replace more than 5% of the smart TV under guarantee. For how

long the guarantee should be made (round to the nearest tenth of a year)?

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