1) In a 2012 the general social survey asked 847 adults how many years of education...

1) In a 2012 the general social survey asked 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 two decimal places.
a) 99.9% confidence interval for the mean number of years of education is ---< mean <----

2) the average is 34.12 and standard deviation of 23.43. a sample of 139 were asked to pronounce letters within one minute. round to at least two decimal places.
a) a 99% confidence interval for the mean number of letter sounds identified in one minute

3) Boxes of cereal are labeled 14 ounces, a sample of 16 boxes.
14.09, 13.97, 14.18, 14.19, 14.17, 14.09, 14.05, 13.97, 14.14, 14.13, 14.20, 14.21, 14.17, 14.15, 14.06, 14.05
construct a 99% confidence interval for the mean weight. round the answers to at least three places.
----< mean <-----

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In 2012 the General Social Survey asked 840 adults how many years of education they had....

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