Following table provides information on standard deviations of Principal Component Analysis on a certain dataset. There are 15 variables in the data and PCA is run on scaled data. The following standard deviations of the variations that are being explained by the 4 Principal Components.
PC1 PC2 PC3 PC4 Stdev 2.3 2.1 1.5 0.960
What is the proportion of total variability explained by the 4 PC’s?
[here PC means Principal Component]