Foot drop Common Causes. Introduction: This information shows the various causes of Foot drop, and how common these diseases or conditions are in the general population. This is not a direct indication as to how commonly these diseases are the actual cause of Foot drop, but gives a relative idea as to how frequent these diseases are seen overall.
Variability refers to how spread out a group of data is. The common measures of variability are the range, IQR, variance, and standard deviation. Measures of variability are descriptive statistics, which means they can only be used to describe the study data.
Variability is an important factor in evolution as it affects an individual's response to environmental stress and thus can lead to differential survival of organisms within a population due to natural selection of the most fit variants.enetic variability is a measure of the tendency of individual genotypes in a population to vary from one another, also. Variability is different from genetic diversity, which is the amount of variation seen in a particular population.