Khan Academy
Khan Academy: Calculating Sum of Squares Within and Between
Video demonstrates how to calculate the sum of squares within and the sum of squares between.
Khan Academy
Khan Academy: Statistics: Alternate Variance Formulas
Video shows using algebra to manipulate the variance formula to arrive at alternate variance formulas.
Khan Academy
Khan Academy: Simulation Providing Evidence That (N 1) Gives Unbiased Estimate
A video showing why we divide by n-1 when we calculate our sample varience and why that give us an umbiased estimate of population variance.
Khan Academy
Khan Academy: Simulation Showing Bias in Sample Variance
This video uses a simulation to better understand why we divide by n-1 when we calculated an unbiased sample variance. When we are in an unbiased way trying to estimate the true population varience.
Khan Academy
Khan Academy: Variance and Standard Deviation: Variance of a Population
This video shows how to find a population mean from a set of data and the compute the population variance.
Khan Academy
Khan Academy: Variance and Standard Deviation: Sample Variance
This video shows how to estimate the variance of a population by looking at the data in a sample.
Khan Academy
Khan Academy: Why We Divide by N 1 for the Unbiased Sample Variance
This video is reviewing the population mean, sample mean, population variance, sample variance and building an intuition for why we divide by n-1 for the unbiased sample variance.
Khan Academy
Khan Academy: Exploring Standard Deviation 1 Module
A video exploring standard deviation. [3:58]
Crash Course
Crash Course Statistics #4: Measures of Spread
This episode looks at measures of spread, or dispersion, which we use to understand how well medians and means represent the data, and how reliable our conclusions are. They can help understand test scores, income inequality, spot stock...
Khan Academy
Khan Academy: (N 1) Gives Us an Unbiased Estimate of Variance
This video uses a simulation to better understand why we divide by n-1 when we calculated an unbiased sample variance. When we are in an unbiased way trying to estimate the true population varience.
Khan Academy
Khan Academy: Statistics: Variance of a Population
Video first reviews sample and population mean and their notation. Gives example of how variance is a useful description of a set and shows how to calculate variance including notation. Includes link to practice problems. [12:23]
Khan Academy
Khan Academy: Anova 2: Calculating Ssw and Ssb (Sum of Squares Within & Between)
Analysis of Variance 2 - Calculating SSW and SSB (Total Sum of Squares Within and Between).
Sophia Learning
Sophia: Employing the Empirical Rule: Lesson 4
This lesson shows how to put the empirical rule to use. It is 4 of 7 in the series titled "Employing the Empirical Rule."
Sophia Learning
Sophia: Employing the Empirical Rule: Lesson 6
This lesson shows how to put the empirical rule to use. It is 6 of 7 in the series titled "Employing the Empirical Rule."
Sophia Learning
Sophia: Employing the Empirical Rule: Lesson 7
This lesson shows how to put the empirical rule to use. It is 7 of 7 in the series titled "Employing the Empirical Rule."
Sophia Learning
Sophia: Z Score Charts: Lesson 2
This lesson shows how charts can be used to determine and list Z-scores. It is 2 of 4 in the series titled "Z Score Charts."
Sophia Learning
Sophia: Z Score Charts
This lesson shows how charts can be used to determine and list Z-scores.
Sophia Learning
Sophia: Z Score Charts: Lesson 3
This lesson shows how charts can be used to determine and list Z-scores. It is 3 of 4 in the series titled "Z Score Charts."
Sophia Learning
Sophia: Z Score Charts
This lesson shows how charts can be used to determine and list Z-scores.
Sophia Learning
Sophia: Z Score Charts
This lesson shows how charts can be used to determine and list Z-scores.
Sophia Learning
Sophia: Z Score Charts
This lesson shows how charts can be used to determine and list Z-scores.
Sophia Learning
Sophia: Z Scores
In this lesson, students are introduced to Z-scores and their relevance to variance and distribution in data sets.
Sophia Learning
Sophia: Z Scores
In this lesson, students are introduced to Z-scores and their relevance to variance and distribution in data sets.