Which of the following statements are not true?
A) The way to incorporate a qualitative (categorical) variable with three possible categories into a regression model is to define a single-numerical variable with coded values such as 0, 1, and 2 corresponding to the three categories.
B) Incorporating a categorical variable with c possible categories into a multiple regression model requires the use of c-1 indicator variables.
C) The positive square root of the coefficient of multiple determination is called the multiple correlation coefficient R.
D) All of the above statements are true.
E) None of the above statements are true.

Question

Quizplus · Accepted Answer

DStatement A is not true because the correct way to incorporate a categorical variable with three categories into a regression model is through the use of two (c-1, where c is the number of categories) dummy variables, not by assigning numerical values like 0, 1, and 2, which would imply an ordinal relationship that may not exist. Statements B and C are true, making D incorrect as it claims all statements are true.

Which of the Following Statements Are Not True