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Excerpt from Manual of Mental and Physical Tests: A Book of Directions Compiled, With Special Reference to the Experimental, Study of School Children in the Laboratory or Classroom
In the introductory sections of the volume, I have sought to show the general purposes of mental tests, to lay down rules for their conduct, and to explain the methods of treating data. In this connection I discuss the calculation of measures of general tendency, measures of variability, indexes of correlation, and other statistical constants.
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