Explain how a researcher should handle results that are opposite to what was hypothesized (negative results).
What will be an ideal response?
Ques. 2Assume you are using GRE scores and undergraduate grades to predict graduate GPA. If the correlation of GRE scores and undergraduate grades were .18 rather than .56, then GRE scores would be ____ for predicting graduate GPA.
a.
more useful
c.
less useful
b.
equally useful
Ques. 3The correlation between the Graduate Record Examination (GRE) and undergraduate GPA for all people taking the GRE is .56. If the correlation is recomputed for only those students admitted to graduate school, the value of the correlation will most likely
a.
increase.
c.
stay the same.
b.
decrease.
Ques. 4Describe the differences in how a researcher presents results in a journal article and a conference presentation.
What will be an ideal response?
Ques. 5Before calculating a correlation coefficient, a researcher wants to determine whether the relationship between the two variables is linear. Which of the following would be most appropriate to use?
a. Histogram
c. Data matrix
b. Frequency polygon
d. Scatterplot
Ques. 6Identify the reasons why a null hypothesis might be retained.
What will be an ideal response?
Ques. 7If X is positively correlated with Y, one can conclude that
a. X probably causes changes in Y.
b. Y probably causes changes in X.
c. changes in X and Y are both probably caused by Z.
d. None of these is true.
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