According to the National Testing Service. last year's ACT college entrance exam scores followed a normal distribution with a mean of 20.8 and a standard deviation of 4.8. A student from that testing group is randomly selected. Find the probability that the person's score
was: (remember...for ALL these you have to show your work in finding the zscores AND what went into the parenthesis in normalcdf
and your final answer rounded correctly to 3 significant digits)
a) less than 18
b) between 25 and 30
c) more than 28
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