A manufacturer of cereals claims that the contents of boxes sold weigh on average at least 20
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A manufacturer of cereals claims that the contents of boxes sold weigh on average at least 20 ounces. The distribution of weight is known to be normal, with a standard deviation of 0.5 ounce. A random sample of 25 boxes yielded a sample mean weight of 19.96 ounces. Test at the 10% significance level the null hypothesis that the population mean weight is at least 20 ounces.
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Related Book For 
Statistics For Business And Economics
ISBN: 9781292315034
9th Global Edition
Authors: Paul Newbold, William Carlson, Betty Thorne
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