![]() ![]() Where the critical values corresponds to critical values associated to the F distribution. For the case the ratio of population variances (\(\sigma_1^2\sigma_2^2/\)), the following expression is used: This calculator will compute the 99, 95, and 90 confidence intervals for the mean of a normal population, given the sample mean, the sample size, and the sample standard deviation. A confidence interval is an statistical concept that refers to an interval that has the property that we are confident at a certain specified confidence level that the population parameter, in this case, the ratio of two population variances, is contained by it. ![]()
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