which is statement about R2 is not true? a. it is a measure of magnitude but not

Question

which is statement about R2 is not true?

a. it is a measure of magnitude but not direction of the relationship in simple regression

b. it is sometimes called the coefficient of determination

c. its value indicates the percentage of variation of Y explained by all predictors as a set

d. values can range from -1.00 to +1.00

2. If one nominal level variable had four categories, how many dummy variables would be used to represent it as an independent variable in a regression analysis

a. 1

b. 4

c. 3

d. 2

Explanation / Answer

The value of R-sqaure always ranges from 0 to 1 (or in percentage 0 to 100%).

Answer: d

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2)

Since nominal level variable has 4 categories so number of dummy variables needed is 4-1 = 3

Answer: c = 3

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