Normative data for the 10-min Lean Test in individuals without Orthostatic Intolerance

[jnmaciuch]

I thought error bars on a graph indicated 1 x standard deviation. The sustained increase in heart rate was reported as 6.33 ± 6.82bpm where 6.82 is the standard deviation from the mean of 6.33.

Why then are the error bars in the graph so small?

View attachment 26081

The legend says they’re standard error bars, SD/sqrt(n). Gives you the range of plausible inferred values for the mean

[edit: oops, cross posted with @Murph]