Question

1. Which of the following would be a good dummy variable?  (Select all that apply.)

   		How intelligent someone is (using IQ).
   		None of these
   		If a person’s been in prison.
   		Whether same sex marriage is legal in a country.

2. While correlation is not causation, it is not true that:  (Check all that apply.)

   		Correlations can sometimes be due to a confounding variable.
   		None of these
   		All correlations have no casual connection.
   		Some connected variables are uncorrelated.

Answer 1

Which of the following would be a good dummy variable?

Dummy variables are the one that can be coed as 0 or 1 ( or yes or no )

If a person’s been in prison can be answered in yes or no

Whether same sex marriage is legal in a country. can be answered in yes or no

hence

If a person’s been in prison.

Whether same sex marriage is legal in a country

are the correct answer

While correlation is not causation, it is not true that:  

Correlation can or can not have the casual correlation

All correlations have no casual connection.