Khan Academy
Khan Academy: Normal Distribution: Area Between Two Points
Use a z-table to find the probability that a particular measurement is in a range. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Missouri State University
Missouri State University: Introductory Statistics: Models of Distributions
The different types of distributions are discussed here - uniform, regular, negative exponential, triangular, and normal. The properties of probability distributions are also explained here in detail. A good starting point in the topic...
Missouri State University
Missouri State University: Introductory Statistics: T Test: The T Distribution
This discussion of statistical t distributions is presented in notes with examples added as needed.
University of Colorado
University of Colorado: Normal Probabilities Applet #2
This Applet allows the user to grab and drag the ends of the included region below the standard normal curve to the appropriate places needed. The user directly experiences the connection between the shaded area under the curve and the...
Illustrative Mathematics
Illustrative Mathematics: S Id.4 Do You Fit in This Car?
Students are tasked with solving a common issue for automobile manufacturers that require the students to use normal distribution as a model for data distribution. They will also use mean and standard deviation to figure out the problem....
California State University
Cal State San Bernardino: Central Limit Theorem Applet
In this applet, rolling of dice is studied. The number that lands face "up" on the die is graphed as the die is rolled repeatedly. The user begins to see, with increased accuracy, the standard normal curve appearing as the graph.
Science Struck
Science Struck: Types of Skewed Distribution With Real Life Examples
Explains what is meant by a skewed distribution, describes the two types, and gives examples.
Other
Statistical Engineering: Central Limit Theorem: Summary
The Central Limit Theorem is the foundation for many statistical procedures since the distribution of the situation being studied does not have to be normal. Here is found a complete explanation of the CLT and graphs supporting the...
CK-12 Foundation
Ck 12: Statistics: Sampling Distributions
[Free Registration/Login may be required to access all resource tools.] This concept introduces the sampling distribution of the mean, inferring the population mean from samples and sampling error.
Texas Education Agency
Texas Gateway: Data, Sampling, and Variation in Data and Sampling
This learning module discusses quantitative and qualitative data, the use of two-way tables in marginal and conditional distributions, how to display data, variation in data and samples, and how to critically evaluate statistical...
Missouri State University
Missouri State U.: Introductory Statistics: T Test: One and Two Tailed T Tests
One-tail and two-tail t-distribution tests are explained here in detail. When is one the preferred method? A good comparison is offered.
University of Cambridge
University of Cambridge: Maths and Sports: Olympic Triathlon
Do you think the triathlon will be won by someone who is very strong in one event and average in the other two, or someone who is strong in all three disciplines? This activity challenges students to analyse real-life data and use their...
Web Center for Social Research Methods
Research Methods Knowledge Base: Probability Sampling
This site from Cornell University contains great information on random or probability sampling. Definitely a site worth checking out on the subject.