he average age for licensed drivers in the county is μ = 40 .3 years with a standard deviation of σ = 13.2 years.   What is the probability that you will randomly select a group of n = 9 individuals whose mean age is more than 55 years old?  A) First, what is the Z-score you need to answer this? B)Second, what is the probability? In other words, what is p(M > 55)? p(M>55

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