[IPAC-List] Rescaling exam scores

Keith Poole keith.poole at phoenix.gov
Mon Oct 5 18:25:16 EDT 2015

We have the same preference points per State of AZ statute (5 points, 10 points).  We standardize most test scores to a mean of 70 and standard deviation of 10.  Our system automatically does but I believe the formula is:

((raw score - test mean) / test standard deviation) * 10) + 70

To calculate standard deviation in Excel:  Insert - function - STDEVP

Keith Poole
HR Supervisor
City of Phoenix HR Dept
keith.poole at phoenix.gov

From: IPAC-List [mailto:ipac-list-bounces at ipacweb.org] On Behalf Of Partain, Steven C.
Sent: Monday, October 05, 2015 2:08 PM
To: 'ipac-list at ipacweb.org'
Subject: [IPAC-List] Rescaling exam scores

Our agency has recognized the variation of impact of veterans' preference (for our state: 5 points for veterans and 10 points for disabled veterans) on civil service exams depending on the distribution of scores.  I'm toying with the idea of rescaling all exam scores to standardize distributions and thus standardize the impact of preference.  My statistical background, unfortunately, is a few decades stale.

Does anyone have experience with this sort of rescaling?  I'll eventually figure it out with my google research, but thought maybe one of you does this routinely and has a suggested method/formula.

I'm also interested in any feedback on the concept as it relates to preference.


Steven Partain | HR Manager
Tualatin Valley Fire & Rescue
Direct: 503-259-1292

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