Given: A data set represented in the question
To Determine: The best measure of center and spread
Solution
When it is skewed right or left with high or low outliers then the median is better to use to find the center. The best measure of spread when the median is the center is the interquartile range (IQR).
As for when the center is the mean, then standard deviation should be used since it measure the distance between a data point and the mean
From the representation shown, we can obsered that the data set is skewed to the left,
Hence,
The better measure of center is the median, and
The better measure of spread is the inter-quartile-range(IQR)