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The following are the lifetime (in months} of 16 devices of a same brand. The population standard deviation is 3. Is it acceptable if the

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The following are the lifetime (in months} of 16 devices of a same brand. The population standard deviation is 3. Is it acceptable if the device you purchased has a life time of 31 months? (Evaluate using 95% condence level) 34 25 4B 29 36 28 33 56 3? 28 44 40 40 52 3D 48 (10 marks)

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