Why do bell curves happen

When people refer to a bell curve they are usually referring to the observation that rather than there being a level at which everyone will exist, when you measure something (test scores, incomes, heights, friendliness, politicalness, etc) you will end up with a 'distribution' where some people are very high, lots of people are in the middle, …The low performers are identified quite easily and the action plan can be implemented to improve the performance.What is the chance of getting two heads?It is also known as called gaussian distribution, after the german mathematician carl gauss who first described it.Easy, it's 0.5 x 0.5 = 0.5 2 = 0.25.

Most people would say the gaussian aka normal distribution aka bell curve, because that distribution is the swiss army knife of statistical analysis.The bell curve by richard j.Charles murray is an incredibly successful — and pernicious — policy entrepreneur.Bell curve is the name given to the shape of the normal (gaussian) distribution of errors, describing in theory the way many composite measurement errors occur — think of sharpshooting with a properly sighted rifle:It is also known as called gaussian distribution, after the german.

The normal distribution is often called the bell curve because the graph of its probability density looks like a bell.The bell curve typically has us.I was just happy for bell curves , and their use to normalize a distribution.In probability theory, the central limit theorem (clt) establishes that, in most situations, when independent random variables are added, their properly normalized sum tends toward a normal distribution (a bell curve) even if the original variables themselves are not normally distributed.