The McLean Vending Machine Company must adjust its machines to accept only coins with specified weights. We

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The McLean Vending Machine Company must adjust its machines to accept only coins with specified weights. We will obtain a sample of quarters and weigh them to determine the mean. How many quarters must we randomly select and weigh if we want to be 99% confident that the sample mean is within 0.025 g of the true population mean for all quarters? If we use the sample of quarters in Data Set 13 of Appendix B, we can estimate that the population standard deviation is 0.068 g.
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Elementary Statistics

ISBN: 9780321225979

3rd Canadian Edition

Authors: Mario F. Triola

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