calculating variance based on a sample of data what makes variance different can the average variance be calculated based off a population mean calculate variance from population mean i need to know the sample mean and the variance. how to figure the variance in a population calculate variance of a sample how to calculate variances can you calculate the variance from population mean what is the formula to calculate variance how do i calculate variance based on population mean how to find variance from sample mean which formula would you use to find variance how do you calculate variance which is the numerical formula for variance how do you find the variance of a population mean? how to find the variance of a population if using variance formula in a sample what would mean how do i calculate variance when using sample variance and population means