        Statistics         Central Tendency Measures Geometric Mean Measures of Location Measures of Position Medidas de Forma      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