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According to R.L. Polk& Co., the average age of cars and light trucks in the U.S. in 2011 was 10.8 years. Assume that the standard
According to R.L. Polk& Co., the average age of cars and light trucks in the U.S. in 2011 was 10.8 years. Assume that the standard deviation for this population is 3.7 years. A sample of 35 randomly selected vehicles was selected. What is the probability that the sample mean will be greater than 10years?
A.=1-normdist(10,10.8,0.6254,true)
B.=1-normdist(10.5,10.8,0.6254,true)
C.=1-normdist(10,10.8,3.7,true)
D.=1-normdist(11,10.8,3.7,true)
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