I need help understanding the attachment.
The distribution shown below has a positive skew. The meanis larger than the median.
The distribution shown below has a negative skew. The mean is smaller than the median.
When you make a histogram (or probability distribution), you can look at the graph and decide whether it is symmetrical, positively skewed, or negatively skewed.
A symmetric distribution (usually you see one peak in the middle – indicating that there are a lot of data points near the middle value – and symmetrical sloping down on either side …
The expert discusses skewness of a distribution.