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Please help this probability and statistics questions with clear steps, thanks you (c) A recent study revealed that the mean amount of television viewed each

Please help this probability and statistics questions with clear steps, thanks you

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(c) A recent study revealed that the mean amount of television viewed each week by a random sample of 100 teenagers was 22.5 hours. Given that these times had a standard deviation of 3.5 hours, find a 99% confidence interval for the mean amount of television watched each week by all teenagers

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