A normal distribution has a mean of µ = 100 with ? = 20 . If one score is randomly selected from this distribution, what is the probability that the score will have a value between X = 80 and X = 100?
a. 0.8413 c. 0.3413
b. 0.1587 d. 0.6826
C
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Tina has been extremely hyperactive for the past week and getting by with only three hours of sleep each night. Her thoughts seem to be racing out of control, and she is convinced that the novel she started last week will become a best seller and win a Pulitzer Prize, even though she has never had any of her writing published in the past. Tina's symptoms suggest that she is currently experiencing
a. dysthymic disorder. b. generalized anxiety disorder. c. a manic episode. d. dissociative fugue.
When we standardize paired data we
a. divide everything by the standard deviation of X. b. convert X to a T score. c. convert both X and Y to z scores. d. subtract the mean from each value of X and Y.
In ____ research, the same individuals are studied at different ages/stages of development
a. cross-sectional b. longitudinal c. between groups d. cohort
_____ areas are highly plastic and tend to become _____ differentiated as people age.
A) Association; less B) Association; more C) Transduction; less D) Transduction; more