Arizona State University at the Polytechnic Campus
Elementary Statistics
MATHEMATIC 226

Summer 2016
8/7/2012
Graphical Analysis
Graphical Analysis
Useful to identify
Dot plots
location of the center (mean),
dispersion (range or standard deviation) and
shape (symmetry) of data
Outliers or unusual observations present?
Dotplot of Weight
Some Graphi
Arizona State University at the Polytechnic Campus
Elementary Statistics
MATHEMATIC 226

Summer 2016
7/31/2012
Variables and Data
Variables and Data
Two types of variables being measured
1. Qualitative Variables
2. Quantitative Variables
Qualitative variable measurements of this variable
are placed in one of several categories. Also called a
categorica
Arizona State University at the Polytechnic Campus
Elementary Statistics
MATHEMATIC 226

Summer 2016
8/10/2012
Distribution Shapes; Symmetry
and Skewness
Distribution Shapes; Symmetry
and Skewness
Definition:
The distribution of a set of data is a table, graph,
or formula that provides two things:
1. The values of the observations
2. How often those valu
Arizona State University at the Polytechnic Campus
Elementary Statistics
MATHEMATIC 226

Summer 2016
7/31/2012
Types of Statistics
Two types of statistics
1. Descriptive
Population and Sample
Definitions
Population
Methods for organizing and summarizing
information.
Graphs, charts, tables, calculation of averages,
standard deviations,
Sample
2. Infere