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.
For example, suppose your data is all of the ACT scores of the students in a small class. Then the standard deviation formula is Suppose the scores are 15, 21, 21, 21, 25, 30, and 35. The mean of this set is 24.8, 88, 67, 90, 92, 83, 97. The highest test score is 97 and the lowest is 67, therefore the range is 97-67 = 30. The standard deviation is another way to measure how close together the elements are in a set of data. The s.d. is the average distance between each data point and the mean.