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Variance is variability and diversity of security from average mean and expected value Variance = standard deviation fo security * co relation (r) devided by standanrd deviation of sensex
The history of the ratio for theÊS&PÊPE 500Êchart has been below 30 since 1880. The ratio started going up around the year 2000. The ratio spiked to over 65 around 2010.
=max(z1:z10) =min(z1:z10) =average(z1:z10)
It is a ratio scale of measurement.
diferece between ratio and regression