What variables are important to men and women as they decide to marry, and what can contribute to a successful marriage?
What will be an ideal response?
Answer not provided.
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Cross-ethnic friendships are characterized by ______.
A. instability and conflict B. showing the need to have culturally similar peers C. a decrease in racial prejudice over time D. negative feedback from peers
Explain how to reduce the chance of an error in testing hypotheses.
What will be an ideal response?
The most common chromosomal abnormality appears on the 21st chromosome and is known as ____
a. Down syndrome c. Triple X syndrome b. anencephaly d. spina bifida
Professor Johnston has found a strong positive correlation between wearing neckties and the frequency of strokes (r = 0.89). He thinks that the necktie reduces blood flow to the brain, preventing the brain from receiving enough oxygen. Professor Johnston and his associates claim to have proven that wearing neckties causes strokes. What error has Professor Johnston made?
a. An r = 0.89 is not a very large r-value. b. Professor Johnston is drawing a causal conclusion from correlational findings. c. Not everyone who wears a necktie wears it very tight. d. Professor Johnston should know that there are other ways for blood to reach the brain.