Chapter 1
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Descriptive statistics
-methods of organizing, summarizing,
and presenting data
.
–
Graphical techniques
-histograms, scatterplots, etc.
–
Numerical techniques
-mean, median, mode, etc.
•
Inferential statistics
-used to draw conclusions or inferences
about characteristics of populations based on sample data
•
Population
-set of all items of interest in a statistical
problem
•
Parameter
-a descriptive measure of a population
•
Sample
-a set of data drawn from the population
•
Statistic
-a descriptive measure of a sample
•
Statistical Inference
-the process of making an estimate,
