This statement was included in a research report:
"A positive correlation was found between the variables of self-reported sleep adequacy and performance on the driving simulator (r = 0.21), although the correlation did not reach statistical significance." A research consumer should evaluate this to mean what?
a. No relationship exists between the two variables.
b. The hypothesis was supported by the data presented.
c. The hypothesis was not supported by the data presented.
d. The relationship between the variables is too weak to have practical application.
ANS: D
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A Because there is a correlation, a relationship has to exist between variables.
B No hypothesis is expressed, so no judgment can be made regarding the statement.
C No hypothesis is expressed, so no judgment can be made regarding the statement.
D The statement explains that the relationships among the variables are too weak for practical application.
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