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Capitolo 3

Misura di tendenza centrale

Cos'è la tendenza centrale?
Cos'è la tendenza centrale?
Descriptive statistics describe or summarize relevant characteristics of a sample and aid in the analysis of data of interest. When analyzing large ...
Media aritmetica
Media aritmetica
The arithmetic mean is the most commonly used measure of the central tendency of a data set. It is defined as the sum of all the elements constituting the ...
Media geometrica
Media geometrica
The mean is a measure of the central tendency of a data set. In some data sets, the data is inherently multiplicative, and the arithmetic mean is not ...
Media armonica
Media armonica
The arithmetic mean is usually skewed towards the larger values in the data set. Therefore, to avoid this inherent bias towards smaller values, the ...
Trimmed Mean
Trimmed Mean
While measuring the mean of a data set, care needs to be taken when associating the mean to its central tendency. The same goes for the arithmetic mean, ...
Media ponderata
Media ponderata
While taking the arithmetic, geometric, or harmonic mean of a sample data set, equal importance is assigned to all the data points. However, all the ...
Valore efficace
Valore efficace
If in an experiment, data values have a probability of being both positive and negative, neither the arithmetic mean, the geometric mean, nor the harmonic ...
Media da una distribuzione di frequenza
Media da una distribuzione di frequenza
Sometimes, data gathered from an experiment on a large sample or population are organized into concise tables. In such cases, the frequency of the ...
Cos'è la moda?
Cos'è la moda?
The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set. There can be more than one ...
Mediana
Mediana
Besides mean, the median is a widely used measure of central tendency. Typically, median is defined as the central or middle value of a data set, measured ...
Midrange
Midrange
A somewhat easy to compute quantitative estimate of a data set’s central tendency is its midrange, which is defined as the mean of the minimum and ...
Asimmetria
Asimmetria
The measures of central tendency calculated from a data set may not reveal much about its intrinsic distribution. If a plot is made of the data ...
Tipi di asimmetria
Tipi di asimmetria
If the frequency distribution of a data set is more inclined towards smaller or larger values, the distribution is said to be skewed. If data values are ...
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