Page 35 - E booklet prep 3 bader 2025 b_Neat

Note:

Dispersion: to any set of values means the divergence or the
difference between its values. The dispersion is small if the
difference between the values is little whereas the dispersion is
big if the difference between the values is great

Dispersion measurements

Range Standard
deviation
Its is the difference
between the greatest It is the positive
square root of the
value and the average deviations of
smallest value in the values from their

The standard deviation of a set of values :

standard deviation ?? = v?(??-?¯?)??

??

Getting the standard deviation by using a frequency
distribution :

standard deviation ?? = v?(??-?¯?)????

? ??

[?? ???? ?????? ???????????? ???? ????????]

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