Fill in the blank. the distribution is used to develop confidence interval estimates of variances or standard deviations. the ▼ normal chi-square z-score student's t distribution is used to develop confidence interval estimates of variances or standard deviations.

A confidence interval is a type of estimate, like a sample average or sample standard deviation, but instead of being just one number it is an interval of numbers.A chi square  statistic is used to investigate whether distributions of categorical variables differ from one another.The Chi Square statistic is commonly used for testing relationships between categorical variables.

The ​ ___chi square distribution is used to develop confidence interval estimates of variances or standard deviations

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i just took the test, the correct answer is .. 31.5 in.