Ranking

Menu location: Data_Transforming and Deriving_Ranks.

This function ranks the workbook data you select and saves the rankings into a new workbook column labelled Rank: Name where Name is the column label of the original data. You can calculate a correction factor for ties in the ranking; five formulae are offered for tie correction:

Σ(t^3 - t /12)
Σ(t * (t-1)/2)
Σ(t * (t-1) * (2t+5))
Σ(t * (t-1) * (t-2))
Σ(t * (t-1) * (t+1))

Here t is the number of data tied at each tie and upper case sigma Σ is the summation across these ties.

The use of tie corrections is a complex subject upon which learned statisticians sometimes disagree.

Example

Test workbook (Nonparametric worksheet: First Born).

Ranking the following agressivity scores for a sample of firstborn twins gives.

First Born ----->	Rank: First Born
86	8
71	3.5
77	6.5
68	1
91	11.5
72	5
77	6.5
91	11.5
70	2
71	3.5
88	10
87	9