321x Filetype PPT File size 0.31 MB Source: www.crsd.org
You will be able to know,
explain and use the following
vocabulary:
Individual Count
Variable Percent
Categorical Variable Bar Graph
Quantitative Variable Pie Chart
Distribution Dotplot
Exploratory Data Stemplot
Analysis Center, Spread, Shape
Outlier
Here are some definitions:
Individual : Objects described by a set
of data. They may be people, animals,
things, etc.
Variable : Any characteristic of an
individual. The variable will likely take
on different values for different
individuals.
(Can you think of some more examples?)
… more definitions:
Categorical Variable : A variable which
focuses on a characteristic of an
individual, allowing it to be placed into one
of several groups or categories.
Quantitative Variable : A variable which
focuses on a characteristic of an individual
that takes on numerical values for which
arithmetic operations can be performed.
(Can you think of some more examples?)
… more definitions:
Distribution : a way of demonstrating
what values a variable take on and
how often it takes each value.
Exploratory Data Analysis : Using
statistical tools to examine data and
describe its main features. Comparing
variables, providing graphs and doing
numerical summaries are specific
strategies.
… more definitions:
Count : The number of observations that
fall into a particular category, when
analyzing individuals with a categorical
variable.
Percent : The percentage of observations
that fall into a particular category, when
analyzing individuals with a categorical
variable. This is found by dividing the
count by the total number of observations.
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