The gain trend is the average change in the gain per year. The standard error can be used to determine the precision of the gain trend estimate, and to construct a confidence interval around the estimate to determine if it is significantly different from zero. Up Note that grade improvement categories 2 and 6 each appear in two cells in the table. The input trend standard error is based on the consistency in the trend of students' inputs in the school, and the number of students for which there is data. The standard error can be used to determine the precision of the input trend estimate, and to construct a confidence interval around the estimate to determine if it is significantly different from zero.
Inputs are students' ITBS scores from the previous year in the previous grade.
The input trend is the average change in student inputs per year. This variable should be used to determine whether the skills of students entering the grade have been changing over time. LGI Learning gain index. This is the gain trend as a percentage of the system gain in the base year of 1991. The mean number of students for which there is ITBS data.