If all the possible pairs of sample means were obtained from a single
population, the mean of the distribution of differences would be
a. a statistic
b. a parameter
c. identical with the mean of the distribution of means
d. equal to one-sixth of the range
b
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__________ are twins who develop from the splitting of a single egg that was fertilized by a single sperm, and __________ are twins who develop from two different eggs that were fertilized by two different sperm.
A. fraternal twins; identical twins B. Monozygotic twins; dizygotic twins C. Sizygotic twins; monozygotic twins D. Identical twins; monozygotic twins E. Fraternal twins; dizygotic twins
The ____ model of mental illness assumes that all disease is the result of the malfunctioning of some aspect of the body, mainly the brain.
a. psychological b. supernatural c. medical d. sympathetic
In an independent groups design the nondirectional alternative hypothesis states _________
a. µ1 > µ2 c. µ1 ?0? µ2 b. µ1 < µ2 d. µ1 = µ2
Ellen is underweight but not less than 85 percent of normal body weight. She often restricts her eating
because she is intensely fearful of becoming fat. She binges and purges at least twice a week. According to the DSM-IV-TR she should be diagnosed A) with no form of eating disorder since her symptoms do not fit anorexia or bulimia. B) with anorexia nervosa, binge/purge subtype. C) with Binge Eating Disorder. D) with Eating Disorder Not Otherwise Specified.