In a skewed left distribution, it would be more appropriate to use the median absolute deviation (MAD) or the interquartile range (IQR) as measures of variation, as they are not as influenced by extreme values as the standard deviation. MAD is the median of the absolute deviations from the median, while IQR is the range of the middle 50% of the data. Both of these measures provide a better representation of the spread of the data in a skewed distribution.
