[Step-by-Step] There are 557 farms in a region, you want to determine the number of cows in this region. A sample of 40 farms show that the mean of cows on
Question:
There are 557 farms in a region, you want to determine the number of cows in this region. A sample of 40 farms show that the mean of cows on a farm is 70 and the standard deviation is 30.
Determine the 95% confidence interval for the number of cows in the region.
Deliverable: Word Document 
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Sample Standard Deviation Calculator - MathCracker.com