3/20/2023
Discussion of Exam 1 and Unit A Projects
Anaysis of Variance Model - See Google Drive\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-S2021\2ePowerPoint\Sec 5.3R
Inference after ANOVA - see My Drive\Stat206-S2021\2ePowerPoint\Sec 5.4R
Individual C.I.s
Multiple comparisons procedures
Example with RStudio
See My Drive\!Class Material\4Exams.R
This is the example that is used in the PPT slides for Chapters 5 and 6
In class exercises
Exercise 5.24 (Turtles and habitat)
Exercise 5.29 (Child poverty)
Please read Chapter 5 and Section 6.1 for class on Wednesday.