Throughout social evolution, social and economic inequalities have generally ________
a. decreased
b. remained much the same in degree, although changing in form
c. increased markedly
d. increased moderately
c
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Sampling error occurs because:
a. the investigator chooses the wrong sample. b. of the operation of chance. c. of a calculation error in obtaining the sample mean. d. the measuring device is flawed.
Experimental and control groups in a laboratory experiment are made as comparable as possible through the processes of ____
a. qualifying and quantifying b. matching and randomizing c. pretesting and posttesting d. testing and retesting e. verification and replication
According to Ben-Zur (2012 ) and Hensley et al. (2012 ), compared to both the married and the divorced, the widowed are the most lonely and have the lowest life satisfaction
Indicate whether the statement is true or false
According to Cohen’s effect size conventions for mean differences, which of the following represents small, medium, and large effects, respectively?
A) .5, .8, 1.0 B) .4, .75, .90 C) .2, .3, .5 D) .2, .5, .8