Sampling distributions help us test hypotheses about means by
a. telling us exactly what the population mean is.
b. telling us how variable the population is.
c. telling us what kinds of means to expect if the null hypothesis is true.
d. telling us what kinds of means to expect if the null hypothesis is false.
C
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Rich is conducting a survey of student opinion of the dining hall at his university. In order to make sure that students from each major are adequately represented he should use the _____ sampling technique
a. random b. cluster c. stratified random d. convenience
Which schedule of reinforcement may have long periods of nonreward that make it harder to discriminate between periods of reinforcement and extinction?
a. secondary b. partial c. continuous d. conditional
As a serious dancer, Justine watches what she eats
She knows that she is underweight, but fears that if she starts eating more that she will get fat. In addition to a preoccupation with food she has also stopped menstruating. Her behaviors suggest that she might be suffering from ________. a) anorexia nervosa b) bulimia nervosa c) compulsive exercise d) phobic disorder
Research aimed at examining whether illness anxiety order is actually better classed as an anxiety rather than a somatic symptom disorder has concluded that illness anxiety disorder
a. should be classified with the anxiety disorders rather than the somatic symptom disorders b. should be classified with both the anxiety and somatic symptom disorders c. is correctly classified as a somatic symptom disorder d. should be classified as neither an anxiety nor a somatic symptom disorder