Letter grades are typically considered ordinal variables. This is because they represent a rank order of performance (e.g., A, B, C, D, F) where each grade indicates a level of achievement, but the intervals between the grades are not necessarily equal. For instance, the difference in performance between an A and a B may not be the same as between a C and a D.
what are the two kinds of variable
It is a qualitative variable.
It is the kind of variable that you purposely change.
It is the kind of variable that you purposely change.
variable
the variable that is most difficult to test
independent
Yes it can, but it depends on what kind of variable and how it relates to the whole number.
the y variable always changes and x is constant
A constant expression.
Neither 100 nor 16.6 is a variable of any kind.
Keen, kidder, kind, kisser, knowing, knowledgeable, knuckle-headed.