descriptive statistics
I just read an article that compares model forecasts by observations. I know something about box plot and I know this article achieves the $y$-axis using the subtraction of model forecast and observations, but I don't know what is this multiply symbols on each box. Please look at the picture and tell me what is the meaning of the "$x$" symbol. Thanks
I think the median (the central line) is closer to $118$ than $116$, but your other values seem reasonable.
If the range is a single length then it is $146-105=41$, as in your edit.
On (b) I would have said that if 5% of the measurements (the difference between 80% and 75%) are between $126$ and $130$, then this corresponds to $800 \times 0.05 = 40$ actual measurements.
You're right, your plot would just end at the third quartile:
Best Answer
Boxplot notation isn't very well standardized, but it's likely that the "X" here indicates the mean of the data being plotted.