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To determine whether the standard deviation for the roughness of surfaces for the two processes can be or cannot be said to be different from one another with an significance level 0f 10 percent.
To determine whether the standard deviation for the roughness of surfaces for the two processes can be or cannot be said to be different from one another with an significance level 0f 10 percent.
The formula used is ::
F-table used is shown below ::
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To determine whether the standard deviation for the roughness of surfaces for the two processes can be or cannot be said to be different from one another with an significance level 0f 10 percent.