Hip flexor strain occurs from overuse of the muscles that help you flex your. knee or do high kicks. This injury occurs in bicyclist, athletes who jump or. run with high knee kicks, athletes like soccer players, who do forceful. kicking activities, and people who practice, and people who practice the. martial arts.
In statistics , a spurious relationship ( see also spurious correlation and spurious regression ) is a mathematical relationship in which two or more events or variables are not causally related to each other ( i.e. they are independent ) , yet it may be wrongly inferred that they are , due to either coincidence or the presence of a certain third , ...
Spurious relationships are false indications of causality. They occur when theory omits an extraneous variable that affects two other variables that have no causal connection. The effects of the extraneous variable on the two other variables leads one to conclude, in error, that the two other variables are causally linked. This silly example illustrates a spurious relationship. City Manager Sapp, of Sappville, has collected data on the past 100 fires to occur in the city.