If all groups in an experiment have approximately the same mean, between-groups variance will be

Which of the following best illustrates the growth in the power of the vice presidency?

A) John Nance Garner's establishment of an office in the West Wing for the vice president B)the direct policy negotiations with Congress while vice president undertaken by Theodore Roosevelt C)the increase in staff under Dick Cheney and his ability to control information and access to the president D)the institutionalization of the vice president as president of the Senate under John Adams

What is the object or activity that is most often cited for impacting air quality?

a. volcanic eruptions b. factories c. driving automobiles d. the sun