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STATISTICS APPLIED by María Marín, composed of the units, specific goal,…
STATISTICS APPLIED by María Marín
MEASURES OF CENTRAL TENDENCY
Definition, it is the tendency to accumulate the data towards the center
measure or average, the measure is an average
Median, is the mean value of an ordered sequence of data.
Fashion, it is a series of data, it is the value that is repeated the most.
introduction to statistics
What is statistics? It is the science that studies data sets and their interpretation in mathematical terms.
History of Statistics since the beginning, statistics were used in representations of letters and other symbols on skins, the Egyptians used it to analyze population data, in China there were records prior to 2000 BC.
Applications of Statistics in human activities, psychology, human geography, economics and to show the quantitative aspects of a situation.
Statistics Divisions
Descriptive statistics
Inductive statistics or statistical inference
DEVIATION MEASURES
Definition are those that tell us how far the data is from the center of a set
Range, is the difference between the highest and the lowest observation in a data series
The variance and standard deviation take into account how the observations are distributed.
The coefficient of variation. It is to compare the dispersion of variables that appear in different units.
DATA COLLECTION AND PRESENTATION
basic concept
population, is the set of all elements.
sample, is the subset of the population that is studied
individual, each of the sample elements
variable each of the traits of a population
Tables is the most elementary way to summarize the collected data
Graphical presentation of data part A
Histograms
Polygons
Graphical data presentation Part B
Bar charts
Pie chart
composed of the units
specific goal
specific goal
specific goal
specific goal