Statistics 1
Objectives
- Explain the difference between a standard deviation and a standard error of the mean
- Define the t-statistic
- Interpet values of t and p
- Describe when to use a one-sample, a two-sample, and a paired t-test
Background
Many people have been shown equations that define standard deviations and standard errors. Some have also been taught that t-tests are used to compare two groups.
These videos try to explain, through examples, what the different measures show and how t-tests “work” without delving too far into the underlying theory. After you have studied this material, you should have a better understanding of whether t-tests (and moreover, what type of t-test) are appropriate for your data.
Accessing files
See GitHub for instructions on how to download the course material to your local computer.
The source files for this lecture are at <repo>/lectures/statistics_1
Other useful material
Core materials
- Lecture videos
Standard deviations, standard errors, and the t-statisic
A demo showing explaining, in broad, non-mathematical terms, the relationship between the standard deviation, the standard error, and t-statistic values.
One and two-sample t-tests
A demo showing how to run one and two-sample t-tests in MATLAB.
Paired t-test
A demo showing how to run a paired t-test.