AP PSYCHOLOGY

Detailed explanation-1: -Roughly 68% of humans will have IQ scores that fall between 85 and 115, or one standard deviation above or below the average human IQ. Expanding the curve out a little further to two standard deviations, you’ll find that over 95% of people will fall between 70-130 on the IQ scale.

Detailed explanation-2: -Standardized IQ tests are designed so that their scores have a ‘bell curve’ 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.

Detailed explanation-3: -A bell curve is a graph depicting the normal distribution, which has a shape reminiscent of a bell. The top of the curve shows the mean, mode, and median of the data collected. Its standard deviation depicts the bell curve’s relative width around the mean.

Detailed explanation-4: -A bell curve is a type of graph that is used to visualize the distribution of a set of chosen values across a specified group that tend to have a central, normal values, as peak with low and high extremes tapering off relatively symmetrically on either side.