A coin-operated soft-drink machine was designed to

Chapter 10, Problem 64E

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Problem 64E

A coin-operated soft-drink machine was designed to discharge on the average 7 ounces of beverage per cup. In a test of the machine, ten cupfuls of beverage were drawn from the machine and measured. The mean and standard deviation of the ten measurements were 7.1 ounces and .12 ounce, respectively. Do these data present sufficient evidence to indicate that the mean discharge differs from 7 ounces?

a What can be said about the attained significance level for this test based on the t table in the appendix?

b Applet Exercise Find the exact p-value by using the applet Student’s t Probabilities and Quantiles.

c What is the appropriate decision if α = .10?

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