Dr. Cortez determined that the mean level of depression for both experimental groups was the same. However, it is important to not only look at the central tendency of both groups, but also the or degree to which they differ from each other.

Variability

Explanation:

Variability is the trait that displays variation occurring in sample of experiment and results .Variation can be present in experiment as samples may differ, condition may differ,different measuring aspect, etc.

According to the question, variability is the factor that should be considered to determine degree of difference present between data and how they are separate from each other in terms of sample structure, measurement , rate, influence etc even though it is producing same results.

not  

cuba  

russia  

iraq  

el salvador  

explanation:

known as the land of volcanoes, el salvador has visit seismic tremors and volcanic movement. it is the main nation in central america that does not have a coastline on the caribbean sea. about portion of all salvadorans live in the wide open. they are poor and don't have power or running water in their homes. in 1525, pedro de alvarado, a lieutenant of cortés's, vanquished el salvador. el salvador, with alternate nations of central america, pronounced its freedom from spain on sept. 15, 1821, and was a piece of a league of central american states until the point when that association broke up in 1838.