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The IQR, mean, and standard deviation of a population P can be used in a simple test of whether or not P is normally distributed, or Gaussian. If P is normally distributed, then the standard score of the first quartile, z 1 , is −0.67, and the standard score of the third quartile, z 3 , is +0.67.
The distribution was first derived by Maxwell in 1860 on heuristic grounds. [5] [6] Boltzmann later, in the 1870s, carried out significant investigations into the physical origins of this distribution. The distribution can be derived on the ground that it maximizes the entropy of the system. A list of derivations are:
Well, I advise you seek professional help on this one. All I can do is mention the treatment section of aneurysm, and point out also the article on cerebral aneurysms. I didn't notice either of them specifically mentioning middle cerebral artery aneurysms. --ParkerHiggins 07:17, 1 December 2005 (UTC)
The first light bulbs ever lit by electricity generated by nuclear power at EBR-1 at Argonne National Laboratory-West, December 20, 1951. [7]The process of nuclear fission was discovered in 1938 after over four decades of work on the science of radioactivity and the elaboration of new nuclear physics that described the components of atoms.