Author Question: When we say that two independent variables, such as gender and age, are confounded, we mean that ... (Read 37 times)

Deast7027 · **on:** Jun 20, 2018

When we say that two independent variables, such as gender and age, are confounded, we mean that

a. one variable blocks the influence of the other.
b. we cannot completely tell the effect of gender apart from the effect of age.
c. we cannot do anything with the study.
d. the data were collected carelessly.

Question 2

When we have very unequal sample variances, we should

a. check our work very carefully when we pool the variances.
b. not pool the variances.
c. average the variances, but not weight them with the degrees of freedom.
d. run some different analysis.