Consider a sample with data values of 10, 20, 12, 17, and 16. Compute the variance and standarddeviation.
Question
Consider a sample with data values of 10, 20, 12, 17, and 16. Compute the variance and standarddeviation.
Solution
Para calcular la varianza y la desviación estándar de los valores de la muestra 10, 20, 12, 17 y 16, sigue estos pasos:
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Calcular la media (promedio) de los datos:
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Calcular la suma de los cuadrados de las diferencias entre cada valor y la media:
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Sumar estos valores:
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Dividir esta suma entre el número de datos menos uno (n - 1) para obtener la varianza:
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Calcular la desviación estándar tomando la raíz cuadrada de la varianza:
Por lo tanto, la varianza es 16 y la desviación estándar es 4.
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