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This Concept Map, created with IHMC CmapTools, has information related to: Rayya U4, Data represented in 2 ways Tables, e.g. ???? X: 2,2,5,5,7,1,9 Mode= 2 , 5, x: 2,2,5 Mean= (2+2+5)÷ 3 = 3 characterized as ∑of the deviations = 0, Median = P50, deviation method ???? by 2 methods, Mean (fulcrum of a seesaw) =Balance Point calculated for than one group is called Overall mean, Range (crude measure of dispersion) measures the spread of only extreme scores, Tables Summarizes quantitatively using 2 Main measures central Tendency, Mode the distribution may have many modes e.g., the raw score method formula <math xmlns="http://www.w3.org/1998/Math/MathML"> <mrow> <mtext> SS= ∑ X2 - ( ∑ X)2÷ N
 </mtext> </mrow> </math>, central Tendency includes 3 submeasures Mode, Variation includes 3 submeasures Standard Deviation, x: 2,2,5 Mean= (2+2+5)÷ 3 = 3 characterized as sensitive to the all scores, Mean (fulcrum of a seesaw) =Balance Point is used in inferential studies as well as ????, x: 2,2,5 Mean= (2+2+5)÷ 3 = 3 characterized as sensitive to th exact score about the mean, e.g. ???? X: 2,4,4,,7,7,9,9,9 Mode= 9, Variation includes 3 submeasures Range (crude measure of dispersion), Standard Deviation characterized as sensitive to the all scores, x: 2,2,5 Mean= (2+2+5)÷ 3 = 3 characterized as least subject to sampling variation, the squared of the standard deviation formula <math xmlns="http://www.w3.org/1998/Math/MathML"> <mrow> <mtext> s^2= SS÷N-1 </mtext> </mrow> </math>