We normally compute the variance using N – 1 in the denominator because

a. it is easier that way.
b. it leads to an unbiased estimate of the sample variance.
c. it leads to an unbiased estimate of the population variance.
d. it overestimates that population variance.


C

Psychology

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Individuals who are socially isolated are at lesser risk for health problems than those that are socially engaged

Indicate whether the statement is true or false.

Psychology

Which of the following is the best way to manage your anger?

a. hitting a pillow b. playing a violent video game c. expressive writing d. yelling and screaming

Psychology

Allison has a piercing headache that is really getting in the way of her ability to do anything. She takes two extra-strength pain killers and sits quietly for a half-hour. When that time is up, the pain has significantly reduced,

and Allison is able to get some of her chores done. Allison will probably take the pain-killers again the next time she has a headache, and this is due to the effects of: a. negative reinforcement b. positive punishment c. negative punishment d. positive reinforcement

Psychology

Research on reducing biases in clinical diagnoses has shown that specialized training

a. has no appreciable effect on reducing biases because they are rooted in basic social-cognitive processes b. can be effective in reducing biases c. must be delivered by a trained clinical professional to be effective d. only works for minority group members

Psychology