Online testing The Educational Testing Service is nowadministering several of its standardized tests online—the CLEP and GMAT exams, for example. Since takinga test on a computer is different from taking a test withpencil and paper, one wonders if the scores will bethe same. To investigate this question, researchers createdtwo versions of an SAT-type test and got 20 volunteers toparticipate in an experiment. Each volunteer took bothversions of the test, one with pencil and paper and theother online. Subjects were randomized with respect tothe order in which they sat for the tests (online/paper)and which form they took (Test A, Test B) in whichenvironment. The scores (out of a possible 20) aresummarized in the table.a) Were the two forms (A/B) of the test equivalent interms of difficulty? Test an appropriate hypothesisand state your conclusion.b) Is there evidence that the testing environment (paper/online) matters? Test an appropriate hypothesis andstate your conclusion.
Online testing The Educational Testing Service is now
administering several of its standardized tests online—
the CLEP and GMAT exams, for example. Since taking
a test on a computer is different from taking a test with
pencil and paper, one wonders if the scores will be
the same. To investigate this question, researchers created
two versions of an SAT-type test and got 20 volunteers to
participate in an experiment. Each volunteer took both
versions of the test, one with pencil and paper and the
other online. Subjects were randomized with respect to
the order in which they sat for the tests (online/paper)
and which form they took (Test A, Test B) in which
environment. The scores (out of a possible 20) are
summarized in the table.
a) Were the two forms (A/B) of the test equivalent in
terms of difficulty? Test an appropriate hypothesis
and state your conclusion.b) Is there evidence that the testing environment (paper/
online) matters? Test an appropriate hypothesis and
state your conclusion.
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