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A={1,2,3} Z={6,7,2} it is the same number of items
They are meaningless because there is no such Roman numeral as Z but CLXXIII is equivalent to 173
2/16, 3/39, z/(13z) where z is any number, integer, non-integer, rational or irrational number.
Whole numbers and integers are identical sets. Both are proper subsets of rational numbers.If Z is the set of all integers, and Z+ the set of all positive integers then Q, the set of all rational numbers, is equivalent to the Cartesian product of Z and Z+.
IQ is distributed normally, with a mean of 100 and a standard deviation of 15. The z-score of 100 is therefore:(value-mean)*standard deviation= (100-100)*15= 0More generally, a raw score that is equivalent to the mean of a normal distribution will always have a z-score of 0.