Distribution can be SYMMETRICAL or SKEWED.
Symmetrical distribution- when data values are evenly distributed about the mean where mean, median and mode are the same.
Skewed distribution- when majority of the data values fall to the left or right of the mean. The tail of the curve indicated the direction of the skewness (right is positive, left is negative).
Negatively or left skewed- majority of the data values fall to the right of the mean. The mean is to the left of the median and the mean and the median are to the left of the mode.
mean < median < mode
Positively or right skewed- majority of the data values fall to the left of the mean. The mean is to the right of the median and the both mean and the median fall to the right of the mode.
mode < median < mean
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