Khan Academy
Khan Academy: Statistics: Difference of Sample Means Distribution
Video shows visually and reviews notation for sampling distributions of random variables. It then visually shows the distribution of the mean of the difference of two random variables and gives the formulas for the mean and variance of...
Annenberg Foundation
Annenberg Learner: Against All Odds: Normal Distributions
A look at how histograms, and the curves that are drawn based on histogram data, can help one analyze data. Video program offers real-life examples to illustrate this: population age and baseball statistics. [28:40]
Texas Education Agency
Texas Gateway: Study Edge Statistics: Measuring Spread of a Distribution
This lesson looks at the different measures of center and variability that are used when analyzing the spread of data in a distribution. Includes downloadable study guide with exercises - guide also covers other topics. [17:21]
Texas Education Agency
Texas Gateway: Study Edge Statistics: The Normal Distribution
This lesson discusses the normal distribution and the use of z-scores. Includes downloadable study guide with exercises - guide also covers other topics. [14:58]
Khan Academy
Khan Academy: Statistics: Normal Distribution Problems: Z Score
Video gives examples of calculating z-scores for a problem when the mean and standard deviation are given. Includes link to practice problems. [7:48]
Khan Academy
Khan Academy: Statistics: Normal Distribution: Standard Normal & Empirical
Video example of giving the mean and standard deviation of the standard normal distribution and finding probabilities using the empirical rule. [8:16]
Virtual Nerd
Virtual Nerd: How Do You Find the Standard Deviation of a Data Set?
This tutorial illustrates the entire process of finding the standard deviation of a data set. [6:17]
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.
Imagine Learning Classroom
Learn Zillion: Video: 'Model a Data Set With a Normal Probability Distribution'
In this lesson, you will learn how to model a data set with a normal probability distribution by using the mean and standard deviation of the data set. [4:59]
Khan Academy
Khan Academy: Exploring Standard Deviation 1 Module
A video exploring standard deviation. [3:58]
Khan Academy
Khan Academy: Normal Distribution: More Empirical Rule and Z Score Practice
Video example of calculating z-scores and explaining how z-scores apply to non-normal distributions.
Khan Academy
Khan Academy: Normal Distribution: Z Score
Video gives examples of calculating z-scores for a problem when the mean and standard deviation are given.
Khan Academy
Khan Academy: Sampling Distribution of Sample Proportion Part 1
This video goes over the formulas for the mean and standard deviation of a sampling distribution of sample proportions. [9:56]
Khan Academy
Khan Academy: Median, Mean and Skew From Density Curves
High level analysis of density curves. A focus on median, mean, left-skew and right-skew.
Khan Academy
Khan Academy: Standard Error of the Mean
Standard Error of the Mean (a.k.a. the standard deviation of the sampling distribution of the sample mean!).
Khan Academy
Khan Academy: Variance and Standard Deviation of a Discrete Random Variable
Finding the variance and standard deviation of a discrete random variable.
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 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.
Sophia Learning
Sophia: Z Test for Population Means
Calculate z-statistic of a population mean. [9:44]