A survey found that people keep their television sets an average of 4.8 years. The standard...
A survey found that people keep their television sets an average of 4.8 years. The standard deviation is 0.90 year. If a person decides to by a new TV set, find the probability that he or she has owned the old set for the following amount of time. Assume the variable is normally distributed.
a. Less than 2.5 years
b. Between 3 and 4 years
c. More than 4.2 years
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A survey found that people keep their television sets an
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