Laverne looks at the tongue of her friend and sees all kinds of bumps on her tongue. "Girl," she says, "you sure have a lot of _____________."

In all the equations we've been dealing with, what's the common theme of the denominator?

A. An indicator of variability B. A difference between two means C. Z scores D. All of the above

More than ______ of men who took part in heavy combat in Vietnam showed symptoms of posttraumatic stress disorder

a. one-third c. two-thirds b. one-half d. three-fourths