What is the difference between a parameter and a variable? (Check all that apply.)
A Parameters are represented with regular letters, and variables are represented with Greek letters.
B Parameters are fit from the data. The values of the variables are par

B Parameters are fit from the data. The values of the variables are part of the data. C Each person's thumb length is composed of the same parameters, and different values for the variables. D The variables have a sub-i to indicate that this value varies for each person. Parameters do not have a sub-i because they are the same for each person.