AP Statistics MCQ
AP Statistics
At one SAT test site students taking the test for the second time volunteered to inhale supplemental oxygen 10 minutes before the test. In fact, some received oxygen, but others (randomly assigned) were given just normal air. Test results showed that 42 of 66 students who breathed oxygen improved their SAT scores, compared to only 35 of 63 students who did not get the oxygen. Which procedure should we use to see if there is evidence that breathing extra oxygen can help test-takers think more clearly?
At one SAT test site students taking the test for the second time volunteered to inhale supplemental oxygen 10 minutes before the test. In fact, some received oxygen, but others (randomly assigned) were given just normal air. Test results showed that 42 of 66 students who breathed oxygen improved their SAT scores, compared to only 35 of 63 students who did not get the oxygen. Which procedure should we use to see if there is evidence that breathing extra oxygen can help test-takers think more clearly?
At one SAT test site students taking the test for the second time volunteered to inhale supplemental oxygen 10 minutes before the test. In fact, some received oxygen, but others (randomly assigned) were given just normal air. Test results showed that 42 of 66 students who breathed oxygen improved their SAT scores, compared to only 35 of 63 students who did not get the oxygen. Which procedure should we use to see if there is evidence that breathing extra oxygen can help test-takers think more clearly?
A) 1-sample t-test
B) 2-proportion z-test
C) matched pairs t-test
D) 2-sample t-test
E) 1- proportion z-test
Answer: B
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