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Population Variance Of Discrete Random Variables
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This lesson focuses on the understanding of population variance and standard deviation of a discrete random variable. What you need to focus is on the formula and you can refer the example as well for a better understanding.

Shreelekha Verma
Masters in Finance. Currently pursuing PG Diploma in Economics from the University of London. You can follow me for Econometrics.

Unacademy user
good one done in 2mins 56 secs
nice class very simply explained