Week 5 Flashcards
1
Q
What does normalisation allow?
A
Allows comparison of scores on different kinds of variables by standardising the distribution.
2
Q
What is a z-score?
A
Datapoint. Standarizes the distribution.
3
Q
How to normalize?
A
Raw score - the sample mean
________________________________
Standard Deviation of the sample
4
Q
Positives of normalisation?
A
+ understand and easily compare scores.
5
Q
What does it mean if the z-score is +2?
A
Data point above the mean.
6
Q
What does it mean if the z-score is -2?
A
Data point below the mean.
7
Q
What does it mean if the z-score is close to 0?
A
Data point close to the mean.
8
Q
Why is normalisation important?
A
Helps finding out how usual or unusual is any given data point.
