Sharing things with only me (use email for this confidential communication)
Please don't hesitate to stop me or ask me to explain things again (audio and video can cut in and out, especially if you are on your phone or using wifi)
Sharing my screen
Changes to our Google Drive folder - new folders for class material, exam and quiz samples, final project samples, 2ePowerPoint (Slides), 2eMarkdown (R code)
Our textbook is available online (Bookshelf.vitalsource.com)
You should not have to go to the P:\ drive for anything for this class
You should not be able to see the !Grades folder or any HW folders for other students
Discussion of Exam 1
Class average is 79.05%, with a standard deviation of 11.08%, and the median is 80%
My solutions (Exam1-Stat206-Solutions.pdf) are in the folder !Exam and Quiz Samples
Your graded exams have been scanned and uploaded to your HW folders
Let's step through the solutions on my screen
The R code for the exam solutions is in three files (BritishUnions.R, CrudeOil.R, and Factors.R)
I may ask some of you to talk about your solutions as we go through this together so we can all begin thinking about statistics again
Modifications to the course syllabus
There will be no more timed exams
Office hours will be held via Zoom sessions and you can set up an appointment at a time that is convenient for you
If my list of available appointments does not work for you, just let me know and we will set up another time to Zoom
Grades will be determined using a slightly different method since timed exams will not be possible.
Problem sessions will become part of our class zoom sessions.
Discussion of Exam 1 Solutions
Sharing my screen for scanned solutions and R code
Tesing out the polling feature
Anaysis of Variance Model - See Google Drive\Stat206-S2020\2ePowerPoint\Sec 5.1-2R
Review of two sample pooled t test
One-way ANOVA Model
Balanced data
Unbalance data
Completely randomized design
Models
One-way Sum of Squares Identity
SSTO = SSTR + SSE
One-way ANOVA Table
Source of Variation
Sum of Squares
d.f.
Mean Square
F-Statistic
p-value
Treatments/Model (Between Groups)
SSTr
k-1
MSTr
MSTr/MSE
Error (Within Groups)
SSE
N-k
MSE
Total
SSTO
N-1
Checking conditions - same as before
Scope of Inference - see My Drive\Stat206-S2020\!Class Material\Sec 5.3R
Inference after ANOVA - see My Drive\Stat206-S2020\!Class Material\Sec 5.4R