Suppose you tested two age groups on the number of details they could recall from a paragraph. The mean for the older group is 16, and the mean for the younger group is 14 . Further suppose that you fail to reject the null hypothesis for this independent samples t-test. Which of the following best accounts for the difference between these sample means?
a. A math error has been made somewhere.
b. The null hypothesis was incorrect to start with.
c. The sample means probably came from different populations, and the difference is due to sampling error.
d. The sample means probably came from the same population, and the difference is due to sampling error.
D
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The primary intervention for schizophrenia is ______
a. SSRIs. b. Antipsychotic Medication c. Cognitive Behavior Therapy d. Dialectical Behavior Therapy
Developmentalists have found that
a. although social class can influence development, human development is the same across cultures. b. race and ethnicity influence development, whereas social class does not. c. social class, race, and ethnicity can exert a strong influence on the course of development. d. social class, race, and ethnicity exert no influence on development.
A student conducts a brief survey at a public lecture and finds that most of the people attending the lecture are either over 50 or under 20 . There are very few people there aged 20 to 50 . If the student were to graph the ages in groups of 10 (e.g. 10 to 20; 20 to 30; 30 to 40, etc), the distribution would look _____
a. normal c. skewed b. bimodal d. uniform
A fatty, waxy substance that insulates portions of some neurons in the nervous system is known as:
A. a neuron. B. a glia cell. C. myelin. D. a dendrite.