For retirement, eligibility is at age 62. If a person reaches age 62 in 2015, for example, then 2015 is the person's year of eligibility. We always index an individual's earnings to the average wage level two years prior to the year of first eligibility.Thus, for a person retiring at age 62 in 2015, we would index the person's earnings to the average wage index for 2013, or 44,888.16.o determine the national average wage index for 2013 at a level that is consistent with the national average wage indexing series for prior years, we multiply the 2012 national average wage index of 44,321.67 by the percentage change in average wages from 2012 to 2013 (based on our tabulated wage data).
These scores are derived from the total raw scores for each test and are on a normalized score scale that has a mean of 10 and a standard deviation (SD) of 3. A scaled score of 10 describes the average of a given age group.
Standard Scores to Z-Scores. As mentioned above, a simple calculation can transform the standard score to a z-score. The z-score can be found by subtracting the mean of the standard scores from the standard score being evaluated and then dividing that difference by the standard deviation of the standard distribution.The formula is: z=(X-M)/s.d. z-score is a score that falls somewhere within the standard normal distribution. Its counterpart on the standard distribution is the standard score. The standard normal distribution and z-score allow all the standardized scores to be weighed equally through a few calculations.