Shape of sampling distribution

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Reference no: EM1394763

CRA, CD's, Inc wants the mean lengths of the "cuts" on a CD be 135 seconds. This will allow the disk jockeys to have plenty of time for commercials within each 10 minite segment. Assume the distribution of the length of the cuts follows a normal distribution with a standard deviation of 8 seconds. Suppose we select a sample of 16 cuts from various CDs sold by CRA CD's Inc. What can we say about the shape of the distribution of the sample mean?

1- 67% of the sample means will be b/w 127 seconds and 143 seconds

2- 95% of the sample means will be b/w 127 seconds and 143 seconds

3- 99% of the sample means will be b/w 127 seconds and 143 seconds

4- 100% of the sample means will be b/w 127 seconds and 143 seconds

Reference no: EM1394763

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