The independent variable is the variable manipulated in a study

A table of random numbers or a random-number generator program is used in

A) choosing samples. B) identifying participants' numbers during an experiment. C) statistical testing procedures. D) matching participants for matched random assignment.

Which person exemplifies the reason why many people join noneconomic interest groups?

a. Tyler is a wheat farmer. He joined the Texas Farm Bureau because the group represents farmers when legislative issues arise that deal with fair trade issues; he wants to make sure he is able to earn as much income as possible.

b. Ann is a teacher. She is a member of the Texas State Teachers Association—a group that not only fights for fair teacher compensation, but also advocates for school safety and free lunch programs for students.

c. Lance is an electrician. He is a member of the local electrical union that fights for increased salaries and benefits for all electricians.

d. Sandra strongly believes that life begins at conception. She joined the Texas Right to Life movement because of her beliefs.