Never, because there is no such distribution.
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Numbers
Latin: tri- (three) nomial (name)
A z distribution allows you to standardize different scales for comparison.
discrete distribution is the distribution that can use the value of a whole number only while continuous distribution is the distribution that can assume any value between two numbers.
Use the continuity correction when using the normal distribution to approximate a binomial distribution to take into account the binomial is a discrete distribution and the normal distribution is continuous.