Statistics. Statistics is the study of the collection, analysis, interpretation, presentation, and organization of data. In other words, it is a mathematical discipline to collect, summarize data.

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s 2: sample variance: population samples variance estimator: s 2 = 4: s: sample standard

Let's now compute the Standard Deviation s. s = 1 n − 1 ( ( x 1 − x ¯) 2 + ( x 2 − x ¯) 2 + + ( x n − x ¯) 2) = 1 5 − 1 ( ( 14 − 54) 2 + ( 36 − 54) 2 + ( 45 − 54) 2 + ( 70 − 54) 2 + ( 105 − 54) 2) = 1 4 (

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The formula for standard deviation is the square root of the sum of squared differences from the mean divided by the size of the data set. For a Population σ = ∑ i = 1 n ( x i − μ) 2 n For a

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