anonymous
  • anonymous
***WILL GIVE MEDAL AND BECOME FAN*** In a sample of 50 households, the mean number of hours spent on social networking sites during the month of January was 45 hours. In a much larger study, the standard deviation was determined to be 8 hours. Assume the population standard deviation is the same. What is the 95% 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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katieb
  • katieb
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anonymous
  • anonymous
Answer choices: - The 95% confidence interval ranges from 8 to 45 hours. - The 95% confidence interval ranges from 40.13 to 45.78 hours. - The 95% confidence interval ranges from 43.87 to 46.13 hours. - The 95% confidence interval ranges from 42.78 to 47.22 hours.
Kash_TheSmartGuy
  • Kash_TheSmartGuy
A is the answer. If you want to study, follow the link- http://assets.openstudy.com/updates/attachments/54188f91e4b0ffbe0b0d1671-nincompoop-1410897070386-peckr.olsenc.devorej.introductiontostatisticsanddataanalysis4ed.brooks2012isbn9780840054906co950s_mvsa_dragged.pdf
anonymous
  • anonymous
Thanks! Mind helping with another?

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Kash_TheSmartGuy
  • Kash_TheSmartGuy
Sure
Kash_TheSmartGuy
  • Kash_TheSmartGuy
I mean- here to help!
anonymous
  • anonymous
Two studies were completed in Georgia. One study in northern Georgia involved 3,000 patients; 84% of them experienced flulike symptoms during the month of December. The other study, in southern Georgia, involved 2,000 patients; 75% of them experienced flulike symptoms during the same month. Which study has the smallest margin of error for a 99% confidence interval? Answer choices: - The northern Georgia study with a margin of error of 2.5%. - The southern Georgia study with a margin of error of 2.5%. - The northern Georgia study with a margin of error of 1.7%. - The southern Georgia study with a margin of error of 1.7%.
anonymous
  • anonymous
@Kash_TheSmartGuy
anonymous
  • anonymous
@Owlcoffee
anonymous
  • anonymous
@jagr2713
anonymous
  • anonymous
Aiming towards answer choice C.

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