2015
Step 1 

Step 2 

Step 3 
Get Mean Scale Score from line numbers in this
data file.


Subtract 'met min'
Scale Score.
from Mean Scale Score to get
Distance From Standard


Multiply Distance From Standard by
proportion of students in grade.

Grade 
Line number 
Mean Scale Score 
 
Scale Score: met min 
= 
Distance from standard 
* 
(Students tested in grade 
/ 
Students) tested in school 
= 
Weighted Distance From Standard 
3 
32257 
2513 
 
2436 
= 
77 
* 
(237 
/ 
237)

= 
77.0 
Step 4 
SUM Weighted Distance From Standard to get
2015 Difference From Standard for James Leitch Elementary

77 
2016
Step 1 

Step 2 

Step 3 
Get Mean Scale Score from line numbers in this
data file.


Subtract 'met min'
Scale Score.
from Mean Scale Score to get
Distance From Standard


Multiply Distance From Standard by
proportion of students in grade.

Grade 
Line number 
Mean Scale Score 
 
Scale Score: met min 
= 
Distance from standard 
* 
(Students tested in grade 
/ 
Students) tested in school 
= 
Weighted Distance From Standard 
3 
856 
2535 
 
2436 
= 
99 
* 
(201 
/ 
201)

= 
99.0 
Step 4 
SUM Weighted Distance From Standard to get
2016 Difference From Standard for James Leitch Elementary

99 
Last steps
Compute the average
2015 
2016 
Sum 
Average 
77

99

176.0 
88.0 
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 133.0
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: 43.0
For the lines, you have the data necessary to plot the chart.
Very last step
The percent of students getting a Free or Reduced Price Meal comes from the following sources: