Question: Do the data in Example 11.8 provide sufficient evidence to indicate a difference in the average monthly cell phone cost depending on the company the

Do the data in Example 11.8 provide sufficient evidence to indicate a difference in the average monthly cell phone cost depending on the company the customer uses?

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Do the data in Example 11.9 provide sufficient evidence to indicate a difference in the average monthly cell phone cost depending on the company the customer uses?

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