Standard Deviation & Variance Flashcards
1
Q
What does standard deviation measure?
A
- Measure of spread
- It tells you the average distance or deviation from the mean & takes into account all of the data
2
Q
What does variance measure?
A
The average degree to which each squared point differs from the mean
3
Q
Standard deviation formula
A
4
Q
Variance formula
A
5
Q
How do you use standard deviation to find anomalies/outliers?
A
Multiply your standard deviation by 2 and add & subtract it from the mean. Everything above and below are anomalies/outliers.
