Cra Cds Inc Wants The Mean Lengths Of The Cuts On A Cd To Be 150 Seconds 2 Minut

CRA CDs Inc. wants the mean lengths of the “cuts” on a CD to be 150 seconds (2 minutes and 30 seconds). This will allow the disk jockeys to have plenty of time for commercials within each 10-minute segment. Assume the distribution of the length of the cuts follows the normal distribution with a population standard deviation of 9 seconds. Suppose we select a sample of 24 cuts from various CDs sold by CRA CDs Inc.

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