U8.02
Visualizing Confidence Intervals
Cards in this group · 5
- U8.02.1The same-looking error bar can mean standard deviation, standard error, or a confidence interval — it must say which
- U8.02.2Two overlapping confidence intervals don't automatically mean the difference between groups isn't real
- U8.02.3A confidence interval shrinks as sample size grows, so the interval alone means little without the count
- U8.02.4A hard-edged interval band implies certainty right up to its border; a gradient fade is more honest
- U8.02.5How wide an interval band looks on screen depends on the y-axis scale, not just the real uncertainty