Standard Deviation

Question 1

What is Standard Deviation

Answer 1

Measure of how spread out all your repeats are for your mean

Question 2

What is advantage of using SD instead of range?

Answer 2

1. SD shows spread of data around the mean, but range is only the difference between highest and lowest value
2. SD reduces effect of anomalies, but range includes anomalies
3. SD can be used to indicate whether different between results is significant