Sleeping outlier: a simple random sample of nine college freshman were asked about how many hours of sleep they typically get per night. The results were: 8.5, 9, 24, 8, 6.5, 6, 9.5, 7.5, 7.5 a) The data contain an outlier that is clearly a mistake. Eliminate the outlier, then construct an 80% confidence interval for the mean amount of sleep from the remaining values. Round the answer to at least two decimal places. An 80% confidence interval for the mean amount of sleep from the remaining values is -----< mean <_____ 2) phonics is an instructional method in which children are taught to connect sounds with letters or groups of letters. A sample of 139 first graders who were learning English were asked to identify as many sounds as possible in one minute. The average letter sounds were identified in 34.12 with a standard deviation of 23.43. a) construct a 99% confidence interval for the mean number of letter sounds identified in one minute. Round your answers to at least 2 decimal places. A 99% confidence interval for the mean number of letter sounds in one minute is -----< mean <------- 3) in 2012 the general society survey asked about 847 adults how many years of education they had. The sample mean was 8.55 years with a standard deviation of 8.52 years a) Construct a 99.9% confidence interval for the mean number of years of education. Round your answers to at least 2 decimal places. A 99.9% confidence interval for the mean number of years of education is -----< mean <----
Sleeping outlier: a simple random sample of nine college freshman were asked about how many hours of sleep they typically get per night. The results were:
8.5, 9, 24, 8, 6.5, 6, 9.5, 7.5, 7.5
a) The data contain an outlier that is clearly a mistake. Eliminate the outlier, then construct an 80% confidence interval for the mean amount of sleep from the remaining values. Round the answer to at least two decimal places.
An 80% confidence interval for the mean amount of sleep from the remaining values is -----< mean <_____
2) phonics is an instructional method in which children are taught to connect sounds with letters or groups of letters. A sample of 139 first graders who were learning English were asked to identify as many sounds as possible in one minute. The average letter sounds were identified in 34.12 with a standard deviation of 23.43.
a) construct a 99% confidence interval for the mean number of letter sounds identified in one minute. Round your answers to at least 2 decimal places.
A 99% confidence interval for the mean number of letter sounds in one minute is -----< mean <-------
3) in 2012 the general society survey asked about 847 adults how many years of education they had. The sample mean was 8.55 years with a standard deviation of 8.52 years
a) Construct a 99.9% confidence interval for the mean number of years of education. Round your answers to at least 2 decimal places.
A 99.9% confidence interval for the mean number of years of education is -----< mean <----
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