Definition - What does System Unit mean? A system unit is the part of a computer that houses the primary devices that perform operations and produce results for complex calculations. It includes the motherboard, CPU, RAM and other components, as well as the case in which these devices are housed. This unit performs the majority of the functions that a computer is required to do.
size constancy - the tendency to perceive the veridical size of a familiar object despite differences in their distance (and consequent differences in the size of the pattern projected on the retina of the eye)
Being able to quantify the degree of co-variation, called correlation, helps leaders understand whether assumptions are on or off base. The word correlation does not imply or mean, causation. A correlation simply means that two measures tend to vary together. A perfect positive, one-to-one (1:1) correlation has a correlation coefficient of +1. A perfect 1:1 negative correlation has a correlation of -1.