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Dawson electronics claims that its new IQ netbook has an average battery life of 400 hours, with a standard deviation of 15 hours. You take

Dawson electronics claims that its new IQ netbook has an average battery life of 400 hours, with a standard deviation of 15 hours.

You take a random sample of 50 IQ netbooks from Dawson Electronics, and find that the average battery life of the sample is 370 hours. Does this mean that the IQ's battery life is less than 400 hours, on average?

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