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CCN and ActMedia provided a television channel targeted to individuals waiting in supermarket checkout ines. The channel show
(b) A sample of 115 shoppers showed a sample mean waiting time of 8.4 minutes. Assume a population standard deviation of a 3.
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Answer #1

a) Ho: Hi M=8 u & 8 given , n. 115 t= 8.4 - 312 test statistic, Z = X-4 z. 8.4 - 8.0 3.2/5175 Z= 1.34 p-value = 0.1802 let lo

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