Suppose we select a sample of 24 cuts from various cds sold, Ask an Expert

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CRA CDs Inc. wants the mean lengths of the "cuts" on a CD to be 148 seconds (2 minutes and 28 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 8 seconds. Suppose we select a sample of 24 cuts from various CDs sold by CRA CDs Inc. What percent of the sample means will be greater than 140 but less than 152 seconds.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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