itsmichelle29
  • itsmichelle29
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?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
Any choices?
itsmichelle29
  • itsmichelle29
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.
anonymous
  • anonymous
D

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itsmichelle29
  • itsmichelle29
I medal and fan
itsmichelle29
  • itsmichelle29
How did u get that
anonymous
  • anonymous
The 99% confidence interval ranges from 55 to 60 hours.
itsmichelle29
  • itsmichelle29
Thanks :)
anonymous
  • anonymous
Thanks sorry I didn't explain I have to go :l
itsmichelle29
  • itsmichelle29
Its fine
itsmichelle29
  • itsmichelle29
I was wrong but that fine
itsmichelle29
  • itsmichelle29
it*

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