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anonymous
 one year ago
***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?
anonymous
 one year ago
***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?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Answer 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
 one year ago
Best ResponseYou've already chosen the best response.1A is the answer. If you want to study, follow the link http://assets.openstudy.com/updates/attachments/54188f91e4b0ffbe0b0d1671nincompoop1410897070386peckr.olsenc.devorej.introductiontostatisticsanddataanalysis4ed.brooks2012isbn9780840054906co950s_mvsa_dragged.pdf

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thanks! Mind helping with another?

Kash_TheSmartGuy
 one year ago
Best ResponseYou've already chosen the best response.1I mean here to help!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Two 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
 one year ago
Best ResponseYou've already chosen the best response.0Aiming towards answer choice C.
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