In which type of prenatal testing is a grainy picture of the fetus generated that allows for identification of the child's position and, at a certain point, its sex?

In the previous example of the smoking cessation study we might be tempted to apply Friedman's test, because it can handle similar data. This would be a bad idea because

a. Friedman's test really won't handle these data. b. Friedman's test will not use some of the information inherent in the data. c. Milton Friedman is a conservative economist, and we only like liberal psychologists. d. We really should use Friedman's test.

Characteristics that are peripheral to the person are called ______________

Fill in the blank(s) with correct word