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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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ericlei12 ericlei12
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The average battery life of the iPhone 4S is reported to be 6.0 hours by Apple. Assume that the standard deviation for the battery life for this cell phone is 30 minutes. A random sample of 50 iPhones had an average battery life of 5.7 hours. Use a 90% confidence interval to test the validity of Apple's claim.
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Business Statistics

Business Statistics


Edition: 2nd
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Natalie P.Natalie P.
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ericlei12 Author
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You make an excellent tutor!
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Correct Slight Smile TY
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Just got PERFECT on my quiz
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