Thursday
October 23, 2014

Homework Help: stats

Posted by cindy on Wednesday, March 31, 2010 at 1:26pm.

A random sample of 40 men drank an average of 20 cups of coffee per week during examination final,
with the population standard deviation equal to 6 cups. A lower limit of an approximate 95% confidence
interval the population average cup of coffee is
(1) 20.000
(2) 21.859
(3) 19.708
(4) 18.141
(5) 19.051
I calculated the answer as no4?

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