what is the first error he made in computing the standard deviation?\nyuri failed to find the difference…

what is the first error he made in computing the standard deviation?\nyuri failed to find the difference between each data point and the mean.\nyuri divided by n instead of n - 1.\nyuri did not subtract 9 - 14 correctly.\nyuri failed to square -2 correctly.

what is the first error he made in computing the standard deviation?\nyuri failed to find the difference between each data point and the mean.\nyuri divided by n instead of n - 1.\nyuri did not subtract 9 - 14 correctly.\nyuri failed to square -2 correctly.

Answer

Explanation:

Step1: Recall standard - deviation formula

For a sample, the formula for the standard deviation $s=\sqrt{\frac{\sum_{i = 1}^{n}(x_{i}-\bar{x})^{2}}{n - 1}}$, where $x_{i}$ are data - points, $\bar{x}$ is the mean, and $n$ is the number of data - points.

Step2: Analyze the given calculation

In the given calculation, the denominator is $n = 4$ instead of $n-1=3$.

Answer:

Yuri divided by $n$ instead of $n - 1$.