correlations Flashcards
1
Q
what is statistical covariance
A
- a measure of how two variables change each other
- cross-product deviations
2
Q
what is Pearson’s correlation coefficient
A
- parametric - for normally distributed data
- tell us how much two variables are related to each other
- standardises covariances to create a correlation coefficient
- covariance/SD
3
Q
what test do we use for non-normal data
A
- spearman’s rho
- non-parametric test
- ordinal or categorical data
4
Q
how to create scatter graph on SPSS
A
- graphs
- chart builder
- scatter plot
5
Q
how do we check if the data is normally distributed
A
- analyse
- descriptive stats
- explore
- normality plots with test
- shapiro-wilk test
6
Q
how to do spearman’s rho test
A
- analyse
- correlations
- bivariate
