Your math teacher intentionally misinterprets the definition of N99 masks to bring you this challenge. If the diameters of saliva particles are uniformly distributed between 5 and 21 micrometers, how many particles are needed so that the average diameter of the saliva particles is within 3.2 micrometers of the true population mean with at least 99 percent probability?
P(9.8 < < 16.2) = 0.99
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