A survey found that people keep their televisions an average of 5.1 years. The standard deviation is 0.85 year. If a person decides to buy a

Question

A survey found that people keep their televisions an average of 5.1 years. The standard deviation is 0.85 year. If a person decides to buy a new TV, find the probability that he or she owned the old one for the given amount of time. Assume the random variable is normally distributed.

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Bình An 4 years 2021-08-21T04:31:57+00:00 1 Answers 13 views 0

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    2021-08-21T04:33:47+00:00
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    Answer:

    P(x<4.4)=0.50

    Step-by-step explanation:

    From the question we are told that:

    Mean \=x =5.1 year

    Standard deviation \sigma=0.85

    Generally the equation for Z value is mathematically given by

     Z = (4.4 - 4.4) / 0.73

     Z= 0

    Therefore

    From table

     P(x<4.4)=0.50

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