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 standard deviation is the square root of the variance, which in this case is or 1.73. Comparison to mean absolute deviation. The mean absolute deviation is when the negative sign is ignored so that all deviations are converted to positive numbers, summed, and then averaged.