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 Statistic        Statistics         Introduction Central Tendency Measures Mean Geometric Mean Media Armónica Mediana Moda Measures of Location Centiles Deciles Cuartiles Ejercicio Measures of Position Introducción Desviación media Varianza Desviación típica Coeficiente de variación Ejercicio Medidas de Forma Asimetría Apuntamiento Test      Documento sin título
 Which of the following is NOT a measure of central tendency? Median Mode Variance What is the mean test score for the 15 scores listed below? 5          6          4          7          8 1          2          0          6          9 8          4          8          6          3 6 5,1333… 6,111… A small business recorded the number of computers that were faulty each day for 10 days: 1          1          2          2          2          2          3          3          3          3 Find the mode. 2 2 and 3 The is no mode The number of minutes a train is late each day for a period of 10 days are: 0          1          2          2          2          3          3          3          3          5 Find the median. 2’5 2 and 3 There is no median Second quartile coincides with the mean median mode A group of friend have the following hair colours: black          blonde            black           blonde           red           brown          black             brown          brown           blonde The mean is: Brown Blonde The mean cannot be calculated Which of the following is NOT a measure of dispersion? Range Mean deviation Skewness The coefficient of variation is not very useful when: the mean value is near zero the extrema values are very big there coefficient of variayion can always be calculated A distribution is called leptokurtic when: the excess kurtosis is positive the excess kurtosis is zero the excess kurtosis is negative When the skeness is positive: the distribution is skewed to the right the distribution is symmetrical the distribution is skewed to the left