Reflections Of Life

Sigma and Standard deviation

Sunday, October 02, 2005

Right from my school days, I have had this incessant problem of not being able to remember if ‘sigma’ is standard deviation or variance!! Every term in ISB, I have noted this down in some corner of my cheat sheet (An A-4 sheet with formulae that we are allowed to take to the exams). But this term in ISB, I have successfully remembered this funda… thanks to Simran again :-)

“You tend to think Sigma Squared is Standard deviation because of the S. But the world is never as you think it is… Hence sigma squared is variance!”

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