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Suppose that the mean daily viewing time of television is 8.35 hours. Use a normal probability distribution with a standard deviation of 2.5 hours to answer the following questions about daily television viewing per household
(a) What is the probability that a household views television between 3 and 12 hours a day? (Round your answer to four decimal places.)
(b) How many hours of television viewing must a household have in order to be in the top 3% of all television viewing households? (Round your answer to two decimal places.)
hrs
(c) What is the probability that a household views television more than 5 hours a day? (Round your answer to four decimal places.)
Sagot :
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