Suppose barium concentration in coarse, accumulation and quasi-ultrafine stages is 0.039, 0.189 and 0.056 microgram cubic meter, the what distribution pattern it follows?
I am still learning. When you plot the distribution of barium concentration, you can check the number of peaks it has. If it is one peak, it is unimodal. It is bimodal, if there are 2 peaks. Multimodal means it has multi-peaks.
You may have to plot frequency (number of times on y axis) versus barium quantities (microgram per cubic metres on x axis). Have I got the question right?