An excluded value is any x value that makes a function value y undefined. For a rational function, an excluded value is a value that makes the denominator equal to 0.
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you put the fraction in simplest form (the numerator and denominator have no common factors besides one) then you find what number your variable should be to make the denominator 0. this is excluded value b/c your denominator can never equal 0 the number you found is your excluded value ex. 4 ------ Your excluded value is 3 because 3(3-3)=0 x(x-3)
An extreme value will drag the mean value towards it.
The population mean is the mean value of the entire population. Contrast this with sample mean, which is the mean value of a sample of the population.
Negative z value means that the raw dat is below the mean, if z value is positive it means that the raw data is above the mean.
No, it is not.