Comparison of coefficients of variation

[Hector Maletta]

What is the most adequate statistical test for comparing multiple coefficients of variation? A student of mine has about 100 CV (SD / mean) for the same number of variables, and must ascertain whether they differ significantly or not. Is T-TEST adequate for this?

Hector

 

[Arthur Burke]

Hector ... This source might be useful ...

 

http://cat.inist.fr/?aModele=afficheN&cpsidt=3259228

 

Art

------------------------------------------------------------------

Art Burke
Northwest Regional Educational Laboratory
101 SW Main St, Suite 500
Portland, OR 97204-3213

Phone:  [phone]

Fax: [phone]

[hidden email] 

---

From: Hector Maletta [mailto:[hidden email]]
Sent: Wednesday, May 13, 2009 6:14 AM
To: [hidden email]
Subject: Comparison of coefficients of variation

What is the most adequate statistical test for comparing multiple coefficients of variation? A student of mine has about 100 CV (SD / mean) for the same number of variables, and must ascertain whether they differ significantly or not. Is T-TEST adequate for this?

Hector

 

[Martin P. Holt-2]

Hector,

 

It doesn't seem natural to me.....I'm going back a long way.....but I remember an F-test being used...maybe on the square of the CV?

 

Martin

----- Original Message -----

From: [hidden email]

To: [hidden email]

Sent: Wednesday, May 13, 2009 2:13 PM

Subject: Comparison of coefficients of variation

What is the most adequate statistical test for comparing multiple coefficients of variation? A student of mine has about 100 CV (SD / mean) for the same number of variables, and must ascertain whether they differ significantly or not. Is T-TEST adequate for this?

Hector