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STA1510 exam pack 2021 - chapter key points + practice questions with answer

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2021/2022 Written for academic year
Institution University Of South Africa (Unisa)
Course STA1510 - Basic Statistics
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STA1510 exam pack 2021 - chapter key points + practice questions with answer

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STA1510 – UNISA MODULE


DEFINING AND
COLLECTING DATA

,OBJECTIVES…

• Understanding issues arise when
defining variables
• How to define variable
• How to collect data
• Identify different ways to collect a
sample
• Understand types of survey error

, Populations vs samples


Population consists of all
Sample is a portion of
the items or individuals
population selected fo
about which you want to
analysis. When you analy
reach conclusion. When
data from sample you
you analyze population you
compute statistics.
compute parameters.

, Collecting Data Via Sampling Is Used
When Selecting A Sample Is




Less time consuming than selecting Less costly than selecting every item Less cumbersome and more practi
every item in the population. in the population. than analyzing the entire populatio
Connected book
image
Mark L. Berenson, David M. Levine, Timothy C. Krehbiel Basic Business Statistics
Publisher: 2009 ISBN: 9780136032601 Edition: Unknown

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