The norm in the bar graphs of One Click Reports represents the norm for each applicable grade. The norm for each sex is also included in the text accompanying the bar graph.
Norms will adjust to match the grades of a school. If a district has schools with multiple grade compositions, they will see different Canadian norm values in the text description in their OCRs.
The norms available within the Thematic Reports represents students of equivalent grade levels assessed in the school or district.
The national and provincial lines in the Interactive Charts are compiled with median scores of an entire elementary or secondary school and applies only to the overall mean results (not to drill-downs).
The dark purple line shows the national median for a given measure. The shaded purple area above and below the line represents the distribution of schools above and below the national median. The area above the line represents how tightly the closest 25% of schools fall above the median, and the area below represents the 25% closest who fall below. Therefore, the purple area is an indicator of not just the national median value, but how closely the national population tends to conform to that median.
The same is true for any applicable provincial line.
The replica line compares similar populations of students based on where they fit in on a scale of grade, sex and socioeconomic indicators. We use the results for those indicators to see where your school "fits in" on the scale and then compare it to the aggregated results of other schools that fit into the same place. The replica line is way to make comparisons between populations with similar socioeconomic compositions – apples to apples.