EDA Flashcards
is the science of
collecting, organizing, summarizing,
and analyzing information to draw
conclusions or answer questions.
Statistics
is the set of all entities under study.
Universe
is the set
of all possible values of the variable.
Population
is a numerical summary of a sample.
statistic
is the subset of the population.
Sample
consist of organizing and summarizing
data. —— statistics describe data through numerical
summaries, tables,
Descriptive statistics
uses methods that take a result from a
sample, extend it to the population, and measure the reliability
of the result.
Inferential statistics
PROCESS OF STATISTICS
- Identify the research objective.
- Collect the information needed to answer the
questions. - Organize and summarize the information.
- Draw conclusion from the information.
is a numerical summary of a population.
parameter
are the characteristics of the individuals within the
population.
Variables
is variable that yields categorical
responses. It is a word or a code that represents a class or
category.
Qualitative variables
is a quantitative variable that either a
finite number of possible values or a countable number of
possible values.
discrete variable
takes on numerical values representing
an amount or quantity.
Quantitative variables
is a quantitative variable that has an
infinite number of possible values that are not countable. If
you measure to get the value of a quantitative variable, it is
continuous.
continuous variable
is the process of
assigning value to a variable.
Measurement
This is the first level of measurement
and it is characterized by data that
consist of names, labels or categories
only. The data cannot be arranged in
ordering scheme.
Nominal Level
This involves data that may be arranged in some order, but
differences between data values either cannot be determined or
meaningless.
Ordinal Level
- This is a measurement level not only classifies and orders the
measurements, but it also specifies that the distances between each
interval on the scale are equivalent along the scale from low interval to
high interval. A value of zero does not mean the absence of the
quantity.
Interval Level
A represents the highest, most precise, level of
measurement. It has the properties of the interval level of
measurement and the ratios of the values of the variable
have meaning. A value of zero means the absence of the
quantity.
Ratio Level
