Which statement about anorexia nervosa is true?
A) About 7 percent of North American and Western European teenage girls are affected by anorexia.
B) During the past half-century, cases of anorexia have increased sharply, fueled by cultural admiration of thinness.
C) In the United States, African-American girls are at greater risk than European-American and Hispanic girls.
D) Boys account for 1 to 5 percent of anorexia cases, and up to half of these are gay or bisexual young people.
Answer: B
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In order to estimate the amount of TV watched by New York City adults, a sociologist surveys a random sample of adults from this city. The average (mean) of the raw scores is a _________
a. population c. statistic b. sample d. parameter
Does a newborn infant look longer at one type of display or another? If so, what?
a. An infant looks longest at a page that is all one color.
b. An infant looks longest at a face or a drawing of a face.
c. An infant looks longest at a straight black line
d. An infant looks equally at any display.
Hippocampal cells that become active only when the subject is in particular locations are called
A) location cells. B) place cells. C) complex cells. D) simple cells. E) spot cells.
Which statement about a blastocyst is true?
A) It consists of a single cell. B) It is a structure that feeds the developing organism. C) Between the seventh and ninth days, it burrows deep into the uterine lining. D) It is a membrane that helps to keep the temperature of the prenatal world constant.