Mean: The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words, it is the sum divided by the count. E.g 10 + 10 + 10 + 10 +10 = 50 50 ÷ 5= 10. 10 is the mean.
Who invented Mean?
The Belgian statistician Quetelet (1796-1874), famous as the inventor of l'homme moyen, the average man, was one of the first scientists to use the mean as tyhe representative value for an aspect of a population.
Mode: The mode is the number that occurs most often in a data set. To find the mode or modal value, it is best to put the numbers in order. Then count how many of each number. A number that appears most often is the mode.
Who Invented Mode?
Early use of the statistical concept of the mode was by English mathematician Karl Pearson (1857-1936) in 1895
Median: The middle number; found by ordering all data points and picking out the one in the middle (or if there are two middle numbers, taking the mean of those two numbers). Example: The median of 4, 1, and 7 is 4 because when the numbers are put in order (1 , 4, 7) , the number 4 is in the middle.
Who invented Median?
An early use in English of the statistical concept of median was Francis Galton's (1822-1911)
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Good Research Subbnesh
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ReplyDeleteHello Subby,
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-Cole