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How To Calculate Variance - YouTube YouTube Start of suggested clip End of suggested clip Now let's calculate the variance. Given these numbers 6 9 14 10 5 8 and 11.. Feel free to pause theMoreNow let's calculate the variance. Given these numbers 6 9 14 10 5 8 and 11.. Feel free to pause the video if you want to try this problem.
Given a sample of data of size n , the sample variance is calculated using s2=1n?1n?i=1(xi?¯x)2.
Variance is what you want to find for your sample set. Each term is what you're using to subtract the mean, which you'll also need to know before calculating the variance. The variable n represents the total number of samples you have.
Variance(?2)=?(x?¯x)2n=(2?6)2+(4?6)2+(6?6)2+(8?6)2+(10?6)25=(16+4+0+4+16)5=405=8. Q.
= sample variance. = sum of? ? = each value. = sample mean. n = number of values in the sample.