Question
The 90% confidence interval for the mean one-way commuting time in New York City is 5.22<mean<5.98 minutes. Construct a 95% confidence interval based on the same data. Which interval provides more information?
Answers
You can play around with Z table stuff at
http://davidmlane.com/hyperstat/z_table.html
http://davidmlane.com/hyperstat/z_table.html
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