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Weiguo Zhang

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AgeFrequency (f)
15 9
16 7
Statistics Unplugged--Chapter Notes (Introduction & Chapter 1)
People use statistical analysis to carry out research and do it in a objective and
quantifiable way.
When studying statistics you should allow yourself to become totally immersed in an
conceptual world, without any thought about direct applications
It is not that easy to get from point A to point B in statistics; it requires a lot of thought
and thinking.
Practice, Practice, Practice will help you succeed in statistics.
Chapter One Notes
Statistics can be used in a number of ways...
A prison psychologist might collect info on levels of aggression in inmates,
while a
teacher might focus on their latest set of student test scores.
Information may be collected on different variables
Variable: Anything that can vary; it is anything that can take on
different quality or
Eg: Age of students, attitudes towards a particular social issue, hours
watching t.v, levels of pollution, ect.
Data: Infomation about variable
Data Set: The collections, organization, and interpretation of data
according to well-defined
Data Distributions: A listing of values or responses associated with a
particular variable in a
data set.
eg: Lets say you are looking at the age of 125 customers who enter a book
store. If you
list the age of each customer who entered (the 125 customers) in a columned
then this would constitute as data distribution.
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