1. The Pearson Correlation By far the most common correlation is the Pearson correlation (or the Pearson productâmoment correlation) which measures the degree of straight-line relationship. D e f i n i t i o n The Pearson correlation measures the degree and the direction of the linearrelationship between two variables.
A core is usually the basic computation unit of the CPU-it can run a single program context (or multiple ones if it supports HW threads such as hyperthreading on intel CPUs), maintaining the correct program state, registers, and correct execution order, and performing the operations through ALUs.
Quad-core processors: In the world of laptops, a dual-core processor is likely to be faster than a quad-core for most of the mainstream applications that the majority of users run; a dual-core CPU often operates at a much higher clock speed, and most general-purpose applications don't make good use of four CPU cores.