Stats & Probability GDC
Video Tutorials/Activities for the TiNspire and Casio (HP Prime to follow . . . .).
Below you will find links to a growing number of video tutorials (or key screenshots) on how to use your TiNspire or Casio calculator, for the Statistics and probability module.
Casio - SL: the 2-sample 'pooled' T-test
TiNspire - SL: the 2-sample 'pooled' Ttest
In IB exams it is assumed that the standard deviation of both sets of data and approximately equal, therefore students will ALWAYS select "pooled"
Select POOLED: "YES" - where the video below chooses "no".
Apologies for the name of the channel from which the above video comes (it may make some students feel less alone though . . . and help change their view!).
METHOD 1: MSE x (n-p) [n=sample/n° of pieces of data, p=n° of parameters(coefficients+constants in the model)]
It's important to be aware: regression coefficients and SSR values are likely to differ if you use the same data, but to a different degree of accuracy. Do not assume you have incorrectly followed the process if your answers differ by
only a little, the most common reason is using a different level of accuracy in the data that was entered.