http:rtisuccessorg. Progress monitoring, one of the essential. components of Response to Intervention (RTI), is. characterized by repeated measurement of academic. performance that is conducted at least monthly. The. process may be used to assess studentsâ academic. performance over time, to quantify student rates of.
Calculating the Air Quality Index. The AQI is calculated by converting measured pollutant concentrations to a uniform index which is based upon peer-reviewed scientific evidence of the health effects associated with a pollutant.
Variance The variance is computed as follows:The variance is the average of the squareddifferences between each data value and the mean.for asamplefor apopulation s 2 m2 =â(x â)N (x i sxi xn 22 1=â ââ 2 () â¢ L.O. 1.2. â¢Rangeâ¢IQRâ¢Varianceâ¢St. Deviationâ¢Coefficient of variation.