Lung nodules are usually about 0.2 inch (5 millimeters) to 1.2 inches (30 millimeters) in size. A larger lung nodule, such as one that's 30 millimeters or larger, is more likely to be cancerous than is a smaller lung nodule.
In statistics, mean absolute deviation is a one of the ways to describe the variability of quantitative data. Mean absolute deviation is used to measure the average amount by which all values in a data set vary from their mean.
The mean size and the standard deviation from that mean can be obtained directly from the statistics of the distribution. Here, the (absolute) standard deviation (or âhalfwidthâ) of the distribution can be compared to the mean, and a relative polydispersity = standard deviation / mean can be obtained.