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anonymous

  • one year ago

In a sample of 200 households, the mean number of hours spent on social networking sites during the month of January was 55 hours. In a much larger study, the standard deviation was determined to be 7 hours. Assume the population standard deviation is the same. What is the 99% confidence interval for the mean hours devoted to social networking in January? The 99% confidence interval ranges from 53.73 to 56.27 hours. The 99% confidence interval ranges from 7 to 55 hours. The 99% confidence interval ranges from 54.51 to 55.49. The 99% confidence interval ranges from 55 to 60 hours.

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  1. anonymous
    • one year ago
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    @Loser66

  2. Loser66
    • one year ago
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    hehehe... @lovingod786 I don't know how to solve it. I am sorry. :)

  3. anonymous
    • one year ago
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    I seen this a minute ago and I can help later. I blanked out on part of it but I have a book at home that will fill my blank but cannot get to it right now :-) I am at work :-(

  4. anonymous
    • one year ago
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    I had to do this in my statistic class. I am just having a brain fart right now and need my book from home to spray some air freshener around lol

  5. anonymous
    • one year ago
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    Lol thats funnny

  6. anonymous
    • one year ago
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    didi you found the answer ?

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spraguer (Moderator)
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