AP Statistics Chapter 1: Data Analysis

• Vocabularies
• 1.1 Categorical Data Analysis
  • Pie Chart
  • Two Way Table
  • Bar Graph
    • Side by Side Bar Graph
    • Segmented Bar Graph
• Quantative Data Analysis
  • Dotplots
  • Histogram
  • Shape
    • Unimodal
    • Multimodal (2 or more peaks)
  • Stemplots
  • Boxplot
• Description of Quantitative Data
  • Center
    • Mean
    • Median
  • Shape
  • Variability
    • Range
    • Standard Deviation
    • IQR
    • Variance
  • Outliers

---

Vocabularies

Quantitative Data : Data that represents amounts

Categorical Data : Data that represents groups (classifications)

Frequency : Actual count of data

Relative Frequency : Percentage of data

Association : Relativeness of two variables

1.1 Categorical Data Analysis

Since I think visual explains all of the charts, I will barely add explations in text for charts.

Pie Chart

Two Way Table

Example Two Way Table

	Company A	Company B	totals
Banana	40	60	100
Apple	40	60	100
totals	80	120	200

Two Way Table in general

	category A	category B	Totals
category 1	J	J	M
category 2	J	J	M
Totals	M	M	Total

\[\begin{aligned} &J \text{ - Joint Frequency} \\ &M \text{ - Marginal Frequency}\\ &{\small \frac{J}{M}} \text{ - Conditional Frequency} \end{aligned}\]

Bar Graph

Side by Side Bar Graph

Segmented Bar Graph

Quantative Data Analysis

Dotplots

Histogram

Shape

Unimodal

Multimodal (2 or more peaks)

Stemplots

Boxplot

Before going into boxplot, I recommend reading Description of Quantitative Data first.

Description of Quantitative Data

Center

Mean

Median

Shape

Variability

Range

Standard Deviation

IQR

Variance

Outliers