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Principales herramientas estadísticasMain statistical tools - Coggle…
Principales herramientas estadísticasMain statistical tools
Deviation measures
They tell us how far the data is from the center of a set
Rank
It is the difference between the highest and the lowest observation in a data series
Formula, R = X-x
Variance
It is the average of the squared differences between each of the observations in a data series and the mean
Formula, s squared = Σ f (x-X-) squared / n
Standard deviation
It is the average of the waste. It tells us how far each value is from the mean
Formula, S = square root of S squared
Coefficient of variation
To buy the dispersion of variables that appear in different units (meters, kilos, etc.) or that correspond to extremely unequal populations. This coefficient only exists to compare the dispersions of variables corresponding to scales of ratio v
Formula, coefficient of variation is s v = s / lxl
Statistics
What is it
Science that studies data sets and their interpretation in mathematical terms
history
Simple forms of statistics have existed since the beginning of civilization, as graphical representations and other symbols were already used on hides, rocks, wooden sticks, and cave walls.
In our days, statistics has become an effective method to accurately describe the values of economic, political, social data. psychological, biological and physical
Aplicaciones
sociology, psychology, human geography, economics, etc.
Divisions
Descriptive statistics
Inductive statistics
Measures of central tendency
They indicate the center of a data set
Median
It is the mean value of an ordered sequence of data. It is affected by the number of observations, not by the magnitude of either extreme.
fashion
In a series of data, the mode is the value that is repeated the most, it is affected by the occurrence of any extreme value
Half
It is calculated by adding all the data and then dividing the total by the number of data involved. It is largely affected by extreme values
Harvest
Census
Shows
Sampling
Variable
Individuo
Population
The data is summarized through tables and with these the data is presented graphically
Histogramas
Poligonos
Graficas de barras
Gráfica de pastel