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A coinoperated drink machine was designed to discharge a mean of ounces of coffee per cup. In a test of the machine, the discharge amounts
A coinoperated drink machine was designed to discharge a mean of ounces of coffee per cup. In a test of the machine, the discharge amounts in randomly chosen cups of coffee from the machine were recorded. The sample mean and sample standard deviation were ounces and ounces, respectively. If we assume that the discharge amounts are normally distributed, is there enough evidence, at the of significance, to conclude that the true mean discharge, level , differs from ounces? Perform a twotailed test. Then fill in the table below. Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.) The null hypothesis: The alternative hypothesis: The type of test statistic: The value of the test statistic: round to at least three decimal places The two at the 0.05 level of significance: round to at least three decimal: At the 0.05 level of significance can we conclude that the true mean discharge differs from 9 ounces? YES OR NO
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