HP48GX Statistical Function

[Albert Chan]

(09-22-2018 09:57 AM)Thomas Klemm Wrote:  
{ 7 15 36 39 40 41 }

• Q1: 11
• Q2: 37.5
• Q3: 40.5
  

But this might not be exactly what you expect.

Yes, not what I expected (Q1, Q3 seems very extreme, to the edges)

My code do this differently, using percentiles.

let A be sorted data points, so A(0) be the smallest data point, A(n) largest
Interpolate for percentage of n: Q1 = 25%, Q2 = 50%, Q3 = 75%

Above example, n = 5:
Q1 = A(1.25) = 20.25
Q2 = A(2.50) = 37.50
Q3 = A(3.75) = 39.75

What is nice about this setup is 0% and 100% match A(0) and A(n) numbers.

Edit: It seems above percentile definition is same as MS Excel
https://exceljet.net/excel-functions/exc...e-function