Overview and Descriptive Statistics
Outline – Populations, Samples and Processes
Outline – Pictorial and Tabular Methods in Descriptive Statistics
Outline – Measures of Location
Outline – Measures of Variability
Chapter 1: Descriptive Statistics
1.1 Populations, samples and processes
Descriptive statistics
Challenger example
Probability and statistics
Data collection (cont’d)
1.2 Pictorial Methods
Golf course yardages
Histogram of power consumption
Density plot of power consumption
Unequal bin widths
Default histogram of strength
Histogram of log strength
Alternative histogram of log strength
Default density plot of strength
Density plot of log strength
Bar plot for health complaints
Sorted bar plot for health complaints
Multivariate data
Measures of location
Quartiles, percentiles, and quantities
Summary of categorical data
Sample Variance and standard deviation
Properties of variance
Comparative boxplots