Brittany came to a therapist complaining that she just doesn't enjoy life lately. she says that for the past couple of months, she finds she just doesn't feel like doing the things that she used to love to do. she has also lost a lot of weight and sleeps much more than usual but still feels tired all the time. she says she just can't concentrate on anything. however, she denies feeling sad. brittany's most likely diagnosis is

Arecent poll of 500 residents in a large town found that only 36% were in favor of a proposed referendum to build a new high school. find the margin of error for this poll if we want 95% confidence in our estimate of the percentage of residents in favor of this proposed referendum.

Researchers endeavoring to conduct an on-line study should consider that there are some potential risks of harm to subjects unique to internet based research. one if the risks is

Steven spielberg's classic movie jaws was a thriller about a great white shark that terrorized tourists at a local beach. just before the shark's appearance, eerie music began playing. as the unseen shark came closer, the tempo of the music picked up. after the audience had experienced this a few times, the sound of the music triggered the emotional reaction of fear in the audience even though the shark still had not appeared. at that point, the sound of the eerie music was a: a) unconditioned response (ucr) b) conditioned response (cr) c) conditioned stimulus (cs) d) unconditioned stimulus (ucs)