Since the sample variance is the point estimate for the population variance,the confidence interval for the population variance will be the sample variance plus or minus a fixed quantity.

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Quizplus · Accepted Answer

The confidence interval for the population variance is not typically calculated by simply adding or subtracting a fixed quantity from the sample variance. Instead, it is calculated using a distribution that takes into account the sample size and level of confidence desired.

Since the Sample Variance Is the Point Estimate for the Population