You're calculating historical variance. What is your "history" -- i.e., what is the time period for which you want to calculate the variance: 30 days, six months, 30 years, and so on?

Variance is a measurement of the spread between numbers in a data set.The variance measures how far each number in the set is from the mean.You can use Microsoft Excel to calculate the variance of ...

Finding variance using Pandas. Although we can write a function to calculate variance in less than 10 lines of code, there is an even easier way to find variance.

Financial variance is the difference between budgeted and actual spending. Positive variance means spending less, negative indicates overspending. Regular monitoring reduces surprises and improves ...

Heart Rate Variability (HRV): What It Means and How to Find Yours Medically reviewed by Angela Ryan Lee, MD, FACC — Written by S. Srakocic on August 18, 2023 Calculating HRV ...

Variance (σ2): The spread between numbers in a specific data set. In finance, the variance is commonly used to calculate how each asset in a portfolio performs in relation to the other assets in ...

Doctors can use EKGs to measure the variation in the time between heartbeats in a specific time period. This is an individual’s heart rate variability. This can be a period of 5 minutes ...

We'll calculate the historical monthly variance of the S&P 500 Total Return Index over a five-year period from August 2010 through July 2015 -- that's 60 observations (5 years x 12 months). Here's ...