Scores on a test of statistics knowledge were obtained for a random sample of 32 psychology students immediately before their final exam in intro stats, and later on their first day of their advanced stats class. For each student, a difference score was computed by subtracting the score on the second test from the score on the first test. The mean difference score was –12 with a standard deviation of 8. Therefore, the 95% confidence interval around mD is ______.
a. [10.98, 13.02]
b. [–14.88, –9.12]
c. [–14.40, –9.60]
d. [–13.02, –10.98]
Ans: B
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Gloria is a 17-year-old girl who weighs 82 pounds and is gaunt and frail. Although she fears food and eating, she focuses on food by talking about it, collecting cookbooks, and cooking huge meals for others. Whenever she looks at herself in the mirror, she thinks she is disgustingly fat. Which disorder is Gloria suffering from?
A. anorexia nervosa B. binge eating C. bipolar disorder D. bulimia
Combat veterans may be diagnosed with post-traumatic stress disorder (PTSD). You wonder about the best way to treat PTSD. This is an example of getting research ideas from ____
a. theory b. random thoughts c. practical problems d. systematic observation
Receptive vocabulary:
a. includes all words the child can actually say. b. includes all words the child understands. c. includes words the child has heard, but does not yet understand. d. is limited to the repetition of syllables the child has heard.
Upon receiving an exam students should avoid _______
a. looking up incorrect items b. reviewing answers c. looking at the grade and put it away d. asking questions