A researcher selects a sample of 100 people to investigate the relationship between gender (male/female) and registering to vote. The sample consists of 40 females, of whom 30 are registered voters, and 60 males, of whom 40 are registered voters. If these data were used for a chi-square test for independence, what is the expected frequency for registered females?
a. 12 c. 40
b. 28 d. 42
B
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Dr. Zelke surveys 50 university students to discover the relationship between textbook price and ratings of readability. Dr. Zelke finds that for these two variables the correlation coefficient is -0.70 . This indicates that
a. more expensive books tend to receive higher readability ratings than less expensive books. b. there is no relationship between textbook price and ratings of readability. c. increasing a textbook's price will cause a decrease in its readability rating. d. more expensive books tend to receive lower readability ratings than less expensive books.
Eight-year-old Eric watches as you flatten one of two equal-sized balls of clay into a pancake. Eric says they both still have the same amount of clay. When he is asked how he knows that the ball and the pancake have the same amount of clay, he points out that the pancake could once again be rolled up into a ball, demonstrating that he
a. is now in the preoperational stage. b. understands the concept of reversibility. c. is unable to decenter. d. is no longer egocentric.
The vestibular system helps us to keep balance by providing information:
A. on the position of the head B. to the cerebellum C. about the position of the body D. regarding the outside environment
The idea of cognitive dissonance explains how we:
a. incorrectly make the fundamental attribution error b. deal with inconsistencies between our beliefs and behaviors c. persuade other people to be obedient to unreasonable orders d. develop stereotypes that differ from those we were raised with