What is a sequence variable?
Ordinal variable is also called "level variable". A type of psychological variable. A variable whose value only indicates the order of the attributes of things in terms of quantity and size. Can be observed on an ordinal scale. The distances between the various values are not necessarily equal, and there is no certain proportional relationship. Generally speaking, statistical methods such as median, percentile, rank correlation coefficient, Y0 test, Kendall's harmony coefficient, and rank-order variance analysis can be used between ordinal variables. For example, all participating athletes are ranked as "first place" and "second place" according to the time it takes to reach the finish line... Obviously, the time difference between the first place and the second place is not equal to the time difference between the second place and the second place. The time difference between the three only indicates the sequential relationship between them, and it neither has an absolute zero point nor can it make a proportional statement.
For example, if students are ranked in a 100-meter race, the fastest one will be ranked first, the second fastest one will be ranked second, and so on, the resulting 1, 2, 3... are the order variables. Another example is the level of education, from small to large, primary school, junior high school, high school, etc. This type of data cannot be statistically processed using simple four arithmetic operations.
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