The Excel output that shows a t-test: 20161101-t-tests-excel-example
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Excellent Video for Lesson 14
October 23, 2017 – 12:13 pm
Here is an excellent video for the Lesson 14 material on hypothesis testing on the population mean when the population variance is known. https://www.youtube.com/watch?v=pGv13jvnjKc&list=PLvxOuBpazmsNo893xlpXNfMzVpRBjDH67&index=2
Statistics On-line Calculator, stattrek.com
September 18, 2017 – 12:56 pm
The statistics on-line calculators found at http://stattrek.com are helpful for probability calculations. Notice the left side links on the main page. First, we will use the Binomial and Poisson calculators, and then later on in the semester we will use the normal and the t-curves.
Difference Between Interval and Ratio Data
January 18, 2017 – 6:30 pm
A interval variable is a measurement where the difference between two values is meaningful. The difference between a temperature of 100 degrees and 90 degrees is the same difference as between 90 degrees and 80 degrees. … However, temperature in Kelvin is a ratio variable, as 0.0 Kelvin really does mean ‘no heat’.
Class Notes for Z Hypothesis Tests
March 25, 2015 – 12:59 pm
The class notes on Lesson 14, Z Hypothesis Tests are available, STAT 2023 Class notes .
Dr. Brenda Masters 