Tag: chi-square

Interview Questions

• Variance interval from 25 observations
• Variance interval from a reported standard deviation
• Confidence interval for a standard deviation
• 90% chi-square interval for a variance
• Confidence interval for a variance using chi-square
• A 24,600 vs 25,400 split on 50,000 users, real or noise?
• When a 5,050 vs 4,950 split is perfectly fine
• SRM on an uneven 90/10 holdback split
• A 0.5% imbalance that still fails the SRM test
• Is your 50/50 split actually 50/50? A sample-ratio check