View source for Applicable Mathematics/Univariate Data

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== univarite statistics ==

a basic introduction (not complete)

<math>\Sigma</math>: <u>"sigma"</u> which means <u>"sum of"</u>

example:

<math>\sum_{i=2}^{4} 1 \times i</math>

(considering numbers 1 to 10)

sum of numbers from '''2''' to '''4''' by factor of '''1''' (<math>1 \times i</math>)

4

<big>'''Σ'''</big> 1x<sub>i</sub> = 2 + 3 + 4 '''= 9'''

i=2

the mean (<math>X</math>) =  '''sum''' of all scores / number of scores <big>= '''Σ'''x / n</big>

'''also:'''

standard deviation (§)

variance (v)(§<sup>2</sup>)

box plots

-quartiles

stem plots

class limits, boundaries, classmarks

transformations on data sets

<u>Standard scores</u> (z)

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