Riverside City College

CI for variance or standard deviation use: Confidence interval for population variance: Use , get two values from the table and solve for twice. (Take square root if you want ) df = 3 and the two table numbers are .216 and 9.348. so . and . 1337.18 to 57870.4. 3B. Sample size needed for CI for mean use : sample size needed for CI for mean is . 3C. ................
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