You are conducting an experiment to determine if listening to music while studying improves learning. If there was no difference between the test performance of the experimental and control groups, then we can conclude that
a. extraneous variables were not controlled.
b. the two groups were not randomly assigned.
c. listening to music while studying improves learning.
d. listening to music while studying had no effect on learning.
D
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U.S. government surveys following 9,000 U.S. college-educated workers for a decade revealed that ten years after college graduation, the gender pay gap had
A) closed. B) narrowed slightly. C) narrowed significantly. D) widened.
A score which falls at the 50th percentile must always be at the
a. mean b. mode c. median d. none of these
In the following table, what is the simple frequency of four bedrooms found in the houses of one neighborhood?
# Bedrooms f 2 35 3 54 4 29 5 17 a. 1 b. 4 c. 29 d. 54
When you consider variations in normal mood fluctuations and contrast them with different forms of mood disorder, it is clear that depression __________
A) shows less variability B) is more chronic C) is most likely a single disorder D) is not a single disorder