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8.(7pts) A company wants to develop a battery that lasts over 5 hours (300 minutes). A first test of 12 batteries gave the following lifespans:

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8.(7pts) A company wants to develop a battery that lasts over 5 hours (300 minutes). A first test of 12 batteries gave the following lifespans: 321, 295, 332, 351, 281, 336, 311, 253, 270, 326, 311, 288. Is there evidence that company has met its goals? Test the hypothesis Ho :/ = 300, H :/ > 300 by any method

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