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9.1 Section Exercise 30
IQ: Scores on a certain IQ test are known to have a mean of 100. A random sample of 69 students attend a series of coaching
classes before taking the test. Let u be the population mean IQ score that would occur if every student took the coaching classes.
The classes are successful if u > 100. A test is made of the hypotheses H := 100 versus H : > 100. Consider three possible
conclusions: (i) The classes are successful. (ii) The classes are not successful. (iii) The classes might not be successful.
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Which of the three conclusions is best if He is not rejected?
The best conclusion is (0)
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