Damaging winds, hail, perhaps a tornado or two will be possible from the lower Great Lakes into the Ohio Valley. Heavy rain and flooding are possible in the southern Plains and central Mississippi Valley. Elsewhere, heavy snow will impact the upper elevations of the northern and central Rockies. DW3150 Scotts Valley (D3150)
With standardized IQ tests, IQ tests are designed so that their scores have a âbell curveâ distribution in the general population with an average of 100. This curve has a peak in the middle where most people score and tapering ends where only a few people score. In statistics this is called a normal distribution.
It compares people of the same age or age category and assumes that IQ is normally distributed, that the average (mean) is 100 and that the standard deviation is something like 15 (IQ tests sometimes differ in their standard deviations).