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Sample Standard Deviation

dagilbert

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Nov 9, 2009
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A sample of size n = 20 is selected from a normal population to construct a 90% confidence interval estimate for a population mean. The interval was computed to be (4.00 to 4.20). Determine the sample standard deviation.
 

Subhotosh Khan

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Jun 18, 2007
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dagilbert said:
A sample of size n = 20 is selected from a normal population to construct a 90% confidence interval estimate for a population mean. The interval was computed to be (4.00 to 4.20). Determine the sample standard deviation.
Please share with us your work, indicating exactly where you are stuck - so that we know where to begin to help you
 
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