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Ftest

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plumberet

plumberet

Chemical
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Mar 8, 2008
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I changed one parameter in the process and the graph shows an improvement in the product quality. Thinking of using Excel's Ftest to quantify the confidence level that there is indeed a change.

Your feedback on Ftest to quantify the confidence level ?Other tests available ?

Thanks.
 
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Choices would depend upon the number of samples and what type of data is available showing the quality improvement. You would be looking to do a one-tailed test. A Z-test, t-test, or F test are all possibilities depending upon your data types and/or sample sizes.

Regards,
 
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