Khan Academy
Khan Academy: Statistics: Normal Distribution Problems: Qualitative Sense
Video gives four examples of real world situations and discusses whether or not they would most likely be normally distributed. Discussed bimodal distributions and skewed distributions. [10:53]
Khan Academy
Khan Academy: Sampling Distribution: Standard Error of the Mean
Video first briefly reviews the effect on the sampling distribution when the sample size increases then gives the formula for variance of the sample mean of the sampling distribution and formula for standard error of the mean.
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]
Crash Course
Crash Course Statistics #7: The Shape of Data: Distribution
When collecting data to make observations about the world, it isn't possible to collect ALL THE DATA. So instead of asking every single person about student loan debt, we take a sample of the population and use the shape of our samples...
Khan Academy
Khan Academy: Sampling Distribution: Sampling Distribution of the Sample Mean
Video reviews the central limit theorem and uses a simulation to illustrate sampling distributions and how they approach a normal distribution with larger sample sizes even if the original distribution was not normal.
Khan Academy
Khan Academy: Normal Distribution: Introduction to the Normal Distribution
Video discusses the importance of the normal distribution and gives its formula with examples of how it is used.
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: Sampling Distribution: Sampling Distribution of the Sample Mean 2
Video discusses the effect of sample size on the sampling distribution.
Khan Academy
Khan Academy: Normal Distribution: Empirical Rule
This video uses the empirical rule (or 68-95-99.7 rule) to estimate probabilities for 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: Normal Distribution: Normal Distribution Excel Exercise
Video discusses the importance of the normal distribution. The formula for the normal distribution is given and explained. A url is given where an excel spreadsheet can be downloaded which is shown and used to compare the binomial...
Khan Academy
Khan Academy: Calculating Percentile
Learn how to calculate the percentile rank for a given data point.
Khan Academy
Khan Academy: Qualitative Sense of Normal Distributions (From Ck12.org)
Discussion of how 'normal' a distribution might be.
Khan Academy
Khan Academy: Normal Distribution Problems: Empirical Rule (From Ck12.org)
Using the empirical rule (or 68-95-99.7 rule) to estimate probabilities for normal distributions.
Khan Academy
Khan Academy: More Empirical Rule and Z Score Practice (From Ck12.org)
More Empirical Rule and Z-score practice.
Khan Academy
Khan Academy: Standard Normal Table for Proportion Between Values
Finding the proportion of a normal distribution that is below a value by calculating a z-score and using a z-table.
Khan Academy
Khan Academy: Standard Normal Table for Proportion Below
Finding the proportion of a normal distribution that is below a value by calculating a z-score and using a z-table.
Khan Academy
Khan Academy: Standard Normal Table for Proportion Above
Finding the proportion of a normal distribution that is above a value by calculating a z-score and using a z-table.
Khan Academy
Khan Academy: Threshold for Low Percentile
Find the cutoff for a given lower percentile in a normal distribution.
Khan Academy
Khan Academy: Finding Z Score for a Percentile
Example finding the minimum z-score and numerical threshold to be in a given percentile in a normal distribution.
Khan Academy
Khan Academy: Normal Distribution Excel Exercise
(Long-26 minutes) Presentation on spreadsheet to show that the normal distribution approximates the binomial distribution for a large number of trials.
Khan Academy
Khan Academy: Deep Definition of the Normal Distribution
Exploring the normal distribution.
Khan Academy
Khan Academy: How Parameters Change as Data Is Shifted and Scaled
See how transforming a data set by adding, subtracting, multiplying, or dividing a constant affects measures of center and spread.
Khan Academy
Khan Academy: Worked Example Finding Area Under Density Curves
Worked example finding area under density curves.