If you call the Internal Revenue Service with an income taxquestion, will you ge

Question

If you call the Internal Revenue Service with an income taxquestion, will you get the correct answer? According to aninvestigation conducted by the General Accounting Office, the IRSis giving incorrect answers to 39% of the questions posed by peoplewho call for help with their taxes. Assume 65 taxpayers call theIRS with questions. a) What is the probability that more than 30 will receiveincorrect advice? My question here is, do we need to use normalapproximation or simply normal distribution to solve thisproblem? If you call the Internal Revenue Service with an income taxquestion, will you get the correct answer? According to aninvestigation conducted by the General Accounting Office, the IRSis giving incorrect answers to 39% of the questions posed by peoplewho call for help with their taxes. Assume 65 taxpayers call theIRS with questions. a) What is the probability that more than 30 will receiveincorrect advice? My question here is, do we need to use normalapproximation or simply normal distribution to solve thisproblem?

Explanation / Answer

Yes, you are correct. For MORE than 30 incorrect, you shoulduse X > 30.5

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