Using a χ² test statistic to test the null hypothesis that the variance of a new process is equal to the variance of the current process and when applying the p-value rule, we are rejecting at a p-value less than α, we can conclude that the new process is more consistent than the current process.

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This is true because if the p-value was greater than alpha, the two processes would have had the same consistency.

Using a χ2 Test Statistic to Test the Null Hypothesis

Using a χ² Test Statistic to Test the Null Hypothesis