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Summary: 1
Introduction to Statistics
Section 1: Summarising data
INTRODUCTION
Statistics is that branch of mathematics which studies natural variation.
Adds objectivity to data analysis (deal with variation in scientist's interpretation)
Variation in:
data
scientist's interpretation of that data.
POPULATIONS AND SAMPLES
In collecting data we wish to describe something about the world. What we measure is the
character or variable.
Sample = collection of individual observations selected by a specified procedure.
Population = the totality of individual observations about which inferences are to be made,
existing anywhere in the world, or at least within a definitely specified sampling area limited in
space and time.
Population = mice
Sample = set of mice in laboratory
Population = Regensburg University students
Sample = students in this room
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