In an experiment, the ______ _____ is what researchers manipulate
a) experimental control
b) independent variable
c) control group
d) dependent variable
b
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A sample of n = 9 individuals is selected from a population with ? = 60 and ? = 6, and a treatment is administered to the sample. After treatment, the sample mean is M = 63 . What is the value of Cohen's d for this sample?
a. 0.33 c. 1.00 b. 0.50 d. 2.00
Most cohabiting couples will either get married or break up by the time they have lived together for:
a. one year c. three years b. two years d. four years
A frequency distribution with a cluster of scores and a long tail to its left is called a ________________ distribution
A) negatively skewed B) positively skewed C) normal D) biased
Growth retardation, small head circumference, small eyes, flattened bridge of the nose, and mental retardation are signs of
A. fetal alcohol syndrome. B. Wernicke's disease. C. cirrhosis of the liver. D. alcoholic dementia.