College students listened to either Mozart or silence, and then took an IQ test. Researchers hypothesize that, on average, students perform better on the IQ test after listening to Mozart than after listening to silence.   a) Define the parameter of interest both in words and using the appropriate statistical symbol. b) State the null and alternative hypotheses. c) If the p-value of the test is 0.678, can we conclude that there is no difference in IQ scores after listening to Mozart and after listening to silence, on average, in the population of college students? Explain

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