Which measure of variability describes the average deviation of each score from the mean?

In order to prevent interest groups from influencing politics, it would be necessary to curtail their __________

a. right to bear arms b. freedom of expression c. ability to seek new members d. access to equal protection under the law

Who sent delegates to the national party conventions in the nineteenth and early twentieth centuries?

A)the general public B)party bosses C)state legislators D)congressional delegations