I introduce how to do a 2 sample mean t test comparing 2 means in statistics. I cover the goals of the comparison, the required conditions that need to be checked, robustness, how to combine means and variance, and give the formulas for z-test...t-test...and confidence intervals. I finish with a few examples. EXAMPLE begins at 22:48
I have added some annotations to refine the wording of my example:
DEFINING THE VARIABLES
Mu 1: Population mean improvement of test scores for traditional teaching.
Mu 2: Population mean improvement of test scores for teaching that incorporates technology.
Normality: With N1+N2=20 which is between 15 and 30, the Central Limit Theorem ensures the sampling distribution of difference of means is approximately Normal since the box plots only show mild skewness.
Check out http://www.ProfRobBob.com, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com
Tagged under: compare,comparing,means,sample,2 sample, test,-test,-test,test,confidence,interval,intervals,-interval,robustness,standard,deviation,error,tarrou,tarrou',chalk,talk,profrobbob,math,education,statistics,examples,notes,lecture,Confidence Interval,hypothesis,2 sample test,2 sample -test,2 sample
Clip makes it super easy to turn any public video into a formative assessment activity in your classroom.
Add multiple choice quizzes, questions and browse hundreds of approved, video lesson ideas for Clip
Make YouTube one of your teaching aids - Works perfectly with lesson micro-teaching plans
1. Students enter a simple code
2. You play the video
3. The students comment
4. You review and reflect
* Whiteboard required for teacher-paced activities
With four apps, each designed around existing classroom activities, Spiral gives you the power to do formative assessment with anything you teach.
Carry out a quickfire formative assessment to see what the whole class is thinking
Create interactive presentations to spark creativity in class
Student teams can create and share collaborative presentations from linked devices
Turn any public video into a live chat with questions and quizzes