HP48GX Statistical Function

[Thomas Klemm]

(09-22-2018 12:57 PM)Albert Chan Wrote:  What is nice about this setup is 0% and 100% match A(0) and A(n) numbers.

That's a validd point. However keep in mind that the index starts at 1 and not at 0.

Here's a modified %TILE program that also works for 0 and 100 percent:

Code:

« SWAP SORT DUP SIZE 1 - ROT % 1 + → p
  « DUP p FLOOR GET SWAP p CEIL GET + 2 /
  »
»

Examples:

Taken from Quartile.

{ 6 7 15 36 39 40 41 42 43 47 49 }

• Q1: 25.5
• Q2: 40
• Q3: 42.5
  

{ 7 15 36 39 40 41 }

• Q1: 25.5
• Q2: 37.5
• Q3: 39.5
  

Cheers
Thomas