Loyal reader, have you read your research article yet? Perhaps, you've noticed little lines on all the figures and wondered what they are. Those are error bars.
In the first post, I talked about the type of error that arises due to our finite measurements.This post is about another type of error called standard deviation, which basically relates to the spread of a data set.
You take the magic ruler from the first post and attempt to find the average height of Americans. Ignoring sample size, you take two small groups of five people randomly found on the street.
Group 1 Heights: 5’7”, 5’8”, 5’9”, 5’10”, and 5’11”
Group 2 Heights: 5’3”, 5’6”, 5’9”, 6’0”, and 6’3”
