Zusammenfassung der Ressource
Statistics
- The methods that help transform data into
useful information for decision makers.
- Variable Types:
- Categorical Variables
(Qualitative variables)
- Have values that
can only be placed
into categories such
as yes and no.
- Measurement Scales
- Nominal
Scale:
classifies
data into
distinct
categories in
which no
ranking is
implied.
- Ordinal
Scale:
classifies
values into
distinct
categories in
which
ranking is
implied.
- Numerical Variables
(Quantitative variables)
- Have values that
represent quantities.
- Discrete variables: have
numerical values that arise
from a counting process.
- Continuous variables: produce
numerical responses that arise
from a measuring process.
- Measurement Scales
- Interval Scale:
is an ordered
scale in which
the difference
between
measurements
is a meaningful
quantity but
does not
involve a true
zero point.
- Ratio Scale: is
an ordered
scale in which
the difference
between the
measurements
involves a true
zero point.