Author Question: When is a dummy variable used as an independent variable in a regression model? A) when the ... (Read 228 times)

haleyc112 · **on:** Jun 24, 2018

When is a dummy variable used as an independent variable in a regression model?

A) when the variable involved is numerical
B) when the variable involved is categorical
C) when the variable involved is continuous
D) when two independent variables interact

Question 2

For any significance level , the two-sided rejection region Z z/2 or Z -z/2 has a Type I error probability equal to 1 - .

Indicate whether the statement is true or false