What is population variance, and what is its significance? Learn how to use the population variance formula, and understand population variance vs sample variance.

In this lesson, learn what population variance is and the formula to calculate it. Learn the difference between sample variance and population variance and why they have different formulas.

Master the calculation of sample mean and variance with our 5-minute video lesson. Learn from practice problems and take a quiz to test your knowledge!

Learn about sample variance and compare it to population variance. Explore how to find sample variance using the formula and see the sample variance symbol.

Learn how to calculate the variance of a discrete random variable, and see examples that walk through sample problems step-by-step for you to improve your statistics knowledge and skills.

How do you calculate budget variance? To calculate the budget variance, the company needs information about the actual income or expenses, and the budget that they had previously defined.

Learn about portfolio weight, variance, and return. Discover how to use the portfolio return, weight, and variance formulas, and identify uses of portfolios.

Learn how to calculate the standard deviation of a discrete random variable, and see examples that walk through sample problems step-by-step for you to improve your statistics knowledge and skills.

Define what cost variance is. Learn the cost variance formula and how to perform a cost variance analysis. Discover material and labor cost variance analysis.

Understand what schedule variance is in project management and what it is used for. Learn how to compute it with the given formula and how to...