Question 1102383: A smartphone manufacturer advertises that, on average, its cell phone batteries will last more than 50000 hours. To test the claim, an AUS student took a random sample of 100 smartphones and measured the amount of time until each battery lasted. Mean for the sample is 50650. If we assume that the lifetime of this type of battery has a standard deviation of 4000 hours, can we conclude at the 5% significance level that the claim is true?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A smartphone manufacturer advertises that, on average, its cell phone batteries will last more than 50000 hours. To test the claim, an AUS student took a random sample of 100 smartphones and measured the amount of time until each battery lasted. Mean for the sample is 50650. If we assume that the lifetime of this type of battery has a standard deviation of 4000 hours, can we conclude at the 5% significance level that the claim is true?
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This problem was answered yesterday.
Cheers,
Stan H.
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