1)In a sample of 100 households, the mean number of hours spent on social networking sites during the month of January was 50 ho
urs. In a much larger study, the standard deviation was determined to be 6 hours.
Assume the population standard deviation is the same. What is the 98% confidence interval for the mean hours devoted to social networking in January?
2)Two studies were completed in Florida. One study in northern Florida involved 2,000 patients; 64% of them experienced flu-like symptoms during the month of December.
The other study, in southern Florida, involved 3,000 patients;
54% of them experienced flu-like symptoms during the same month. Which study has the smallest margin of error for a 95% confidence interval?
So the following is the answer of the following question in your problem and please do not post to many question in just one posting. #1 The 98% confidence interval for the mean hours is between 6 and 50. #2 The smallest margin of error between the two is southern florida with 1.8% margin of error.
