M2: Exploring Data with Graphs Flashcards
1
Q
Types of data and their features
A
a) Categorical (Groups)
- Summarized by percentage of observations
b) Quantitative (Numerical)
- Discrete / Continuous
- Center / Spread
2
Q
Graphs for Quantitative Variables
A
a) Dotplot
b) Stemplot
- Stem/Leaf
c) Histogram (Ranks)
3
Q
How to describe graphs for quantitative variables
A
Shape
Outliers (Unusual observations)
Center
Spread
4
Q
Shape with description
A
a) Unimodal (Mound/Bell)
b) Rectangular
- Everything is equally likely
c) Bimodal
- 2 peaks
d) Skewed left
- Tail goes to the left
- Mean < Median
e) Skewed right
- Tail goes to the right
- Mean > Median
5
Q
Graphs used to describe categorical variables (2)
A
a) Pie charts
b) Bar charts
