Nominal scales are used for labeling variables, without any quantative value.

With ordinal scales, it is the order of the values that is important and significant, but the differences between each one is not really known.

Interval scales are numeric scales in which we know not only the order, but also the exact differences between the values.

Ratio scales are the ultimate nirvana when it comes to measurement scales because they tell us about the order, they tell us the exact value between units, and they also have an absolute zero.

A:but discrete binomial also available

The binomial
distribution describes the behavior of a count variable X if
the following conditions apply:

1: The number of observations n is fixed.

2: Each observation is independent.

3: Each observation represents one of two
outcomes ("success" or "failure").

4: The probability of "success" p
is the same for each outcome.

Apr 6th, 2015

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