Introduction to Statistics
Section 1: Summarising data
Statistics is that branch of mathematics which studies natural variation.
Adds objectivity to data analysis (deal with variation in scientist's interpretation)
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