Sentences with phrase «fluctuates from year to year because»

Electricity generation from hydropower, historically the largest source of renewable electricity generation, fluctuates from year to year because of precipitation patterns.

Not exact matches

More specifically, the district and its teachers are not coming to an agreement about how they should be evaluated, rightfully because teachers understand better than most (even some VAM researchers) that these models are grossly imperfect, largely biased by the types of students non-randomly assigned to their classrooms and schools, highly unstable (i.e., grossly fluctuating from one year to the next when they should remain more or less consistent over time, if reliable), invalid (i.e., they do not have face validity in that they often contradict other valid measures of teacher effectiveness), and the like.

So we don't want the public to hang their hat on a recent storm, recent hurricanes for example, because those will fluctuate from year to year.

Tropical cyclones are relatively rare, averaging around 90 a year, and that number fluctuates annually and from decade to decade − largely because of natural causes.

NAR spokesperson Walt Molony told AGBeat, «Monthly membership fluctuates because local dues cycles vary, and outside of the boom years there generally has been a seasonal dip from December to January.