Figure 1. Graph shows PSV of the common carotid artery in an Amazon Indian population. Note that as the sample size increases from 5 to 100 subjects, the SD decreases and the 95% CI becomes narrower.
Figure 1. Graph shows PSV of the common carotid artery in an Amazon Indian population. Note that as the sample size increases from 5 to 100 subjects, the SD decreases and the 95% CI becomes narrower.