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Title: The average battery life of the iPhone 4S is reported to be 6.0 hours by Apple. Assume that the ... Post by: ericlei12 on Dec 30, 2021 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.
Title: The average battery life of the iPhone 4S is reported to be 6.0 hours by Apple. Assume that the ... Post by: Natalie Price on Dec 30, 2021 Content hidden
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