Variance and Standard Deviation

The video tutorial explains variance and standard deviation, two key statistical measures. Variance indicates how data points differ from the mean, while standard deviation is the square root of variance, providing a measure in the same units as the data. Real-world examples, such as tree growth, temperature variations, and airline overbooking, illustrate these concepts. Standard deviation is crucial in finance for assessing investment risk and in sports for evaluating team performance. Understanding these measures helps in comparing data and assessing risk and reward effectively.

What does a high standard deviation indicate about a data set?

Explain how standard deviation is used in finance to assess risk.