ANOVA, single, and multiple factor experiments

Progettazione Sperimentale in R

Joanne Xiong

Data Scientist

ANOVA

Used to compare 3+ groups
An omnibus test:
- won't know which groups' means are different without additional post hoc testing
Two ways to implement in R:

#one
model_1 <- lm(y ~ x, data = dataset)
anova(model_1)

#two
aov(y ~ x, data = dataset)

model_1 <- lm(y ~ x)

model2 <- lm(y ~ x + r + s + t)

y = outcome
- ToothGrowth length
x, r, s, t = possible explanatory factor variables
- How much vitamin C & delivery method

Lending Club is a U.S. based peer-to-peer loan company.
- Data is openly available on Kaggle
Includes all loans issued from 2007-2015
Big!
- 890k observations and 75 variables

Progettazione Sperimentale in R