you get four values of 25 and four that are still 0. So the average will be 100/8 or 12.5 and the square root of 12.5 is about 3.5. That matches the answer from the table (that is, five times ...

\({9}\) is a square number. \(3 \times 3 = 9\) \(3 \times 3\) can also be written as \(3^2\). This is pronounced "\({3}\) squared". \({8}\) is a cube number. The ...

The result is a sample variance of 82.5/9 = 9.17 and a population variance of 8.25. Note that the standard deviation is the square root of the variance, so the standard deviation is about 3.03 for ...