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18 Ιαν 2023 · The variance is a measure of variability. It is calculated by taking the average of squared deviations from the mean. Variance tells you the degree of spread in your data set. The more spread the data, the larger the variance is in relation to the mean.
How to Find Variance. Here’s an example of how to calculate the variance using the sample formula. The dataset has 17 observations in the table below. The numbers in parentheses correspond to table columns.
Variance is a statistical measurement that is used to determine the spread of numbers in a data set with respect to the average value or the mean. The standard deviation squared will give us the variance. Using variance we can evaluate how stretched or squeezed a distribution is.
Sample Variance Formula. Click the card to flip 👆. s^2 = ∑ (x- x̄)^2 / n-1. s^2 is the sample variance. x is the value of each observation in the sample. x̄ is the mean of the sample. n is the number of observations in the sample. Click the card to flip 👆. 1 / 34.
