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(48G) Statistics: Mid-range & Estimator of Standard Deviation
05-31-2017, 09:35 AM (This post was last modified: 06-15-2017 01:47 PM by Gene.)
Post: #1
Gerald H Offline
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Joined: May 2014
(48G) Statistics: Mid-range & Estimator of Standard Deviation
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
»
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(48G) Statistics: Mid-range & Estimator of Standard Deviation - Gerald H - 05-31-2017 09:35 AM



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