9.54 (Answer the following only: (a) Find a 95% Wald CI for p, (b) find a 95% Agresti-Coull CI for p.) what is the difference between (Wald CI and Agresti-Coull ) if the answer is (for 95% CI level): 0.97 +/- 0.01495 (0.95505, 0.98495) 0.95505 < p < 0.98495 A manufacturer of MP3 players conducts a set  of comprehensive tests on the electrical functions of its  product. All MP3 players must pass all tests prior to  being sold. Of a random sample of 500 MP3 players, 15  failed one or more tests. Find a 90% confidence interval  for the proportion of MP3 players from the population  that pass all tests.

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