The U.S. Census Bureau says that 52-question 'long form' received by households during 2000 census takes a mean of 38

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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The U.S. Census Bureau says that 52-question long form' received by households during 2000 census takes a mean of 38
minutes to complete. Suppose a simple random sample of 35 persons is given the form, and their mean time to complete it is
36.8 minutes, with a standard deviation of 4.0 minutes. From these sample results, using non-directional test and the 0.10
level of significance would it seem that the actual population mean time for completion might be some value other than 38
minutes? Also, construct the 90% confidence interval and interpret it!
Transcribed Image Text:The U.S. Census Bureau says that 52-question long form' received by households during 2000 census takes a mean of 38 minutes to complete. Suppose a simple random sample of 35 persons is given the form, and their mean time to complete it is 36.8 minutes, with a standard deviation of 4.0 minutes. From these sample results, using non-directional test and the 0.10 level of significance would it seem that the actual population mean time for completion might be some value other than 38 minutes? Also, construct the 90% confidence interval and interpret it!
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