Suppose old people on average get a lower score on some test than other people do. What can we conclude about test bias, or what additional information would we need?
a. We can conclude that the test is biased against old people.
b. We can conclude that the test is not biased against old people.
c. Before drawing a conclusion, we need to know how many old people answered more than half the questions correctly.
d. Before drawing a conclusion, we need to know whether the test scores accurately predict the performance of old people.
d
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