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+--- Thread: (48G) Statistics: Mid-range & Estimator of Standard Deviation (/thread-8431.html)
(48G) Statistics: Mid-range & Estimator of Standard Deviation - Gerald H - 05-31-2017 09:35 AM
A lazy way to find the average of a set of data is to take half of the sum of max & min values, which is in fact the correct method to find the middle of the range of values.
The programme below finds the mid-range value, MR, for a list of values.
An easy way to quickly calculate a reasonable approximation to the standard deviation of the values is to divide MR by 4.
Code:
« 1. * SORT OBJ
DUP 1. ==
IF
THEN DROP
ELSE SWAP OVER 1.
+ ROLLD 2. - DROPN
+ 2. /
END
»