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	1476002	2407	-	2436	=	-29	*	(38	/	169)	=	-6.52071006
4	1476005	2439	-	2485	=	-46	*	(47	/	169)	=	-12.79289937
5	1476006	2453	-	2528	=	-75	*	(36	/	169)	=	-15.97633133
6	1476009	2504	-	2552	=	-48	*	(48	/	169)	=	-13.63313606
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Louis G. Zeyen Elementary											-49

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	46352	2420	-	2436	=	-16	*	(39	/	159)	=	-3.92452829
4	46354	2473	-	2485	=	-12	*	(36	/	159)	=	-2.71698113
5	46357	2482	-	2528	=	-46	*	(49	/	159)	=	-14.1761006
6	46359	2535	-	2552	=	-17	*	(35	/	159)	=	-3.74213836
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Louis G. Zeyen Elementary											-25

2017

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	47595	2434	-	2436	=	-2	*	(37	/	166)	=	-0.44578313
4	47597	2472	-	2485	=	-13	*	(45	/	166)	=	-3.52409638
5	47598	2500	-	2528	=	-28	*	(35	/	166)	=	-5.90361444
6	47600	2536	-	2552	=	-16	*	(49	/	166)	=	-4.72289155
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Louis G. Zeyen Elementary											-15

2018

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	47605	2431	-	2436	=	-5	*	(30	/	134)	=	-1.11940299
4	47607	2481	-	2485	=	-4	*	(33	/	134)	=	-0.98507462
5	47609	2530	-	2528	=	2	*	(41	/	134)	=	0.6119403
6	47611	2544	-	2552	=	-8	*	(30	/	134)	=	-1.79104478
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Louis G. Zeyen Elementary											-3

2019

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	47788	2438	-	2436	=	2	*	(28	/	141)	=	0.39716312
4	47789	2475	-	2485	=	-10	*	(38	/	141)	=	-2.69503546
5	47790	2502	-	2528	=	-26	*	(35	/	141)	=	-6.4539007
6	47791	2548	-	2552	=	-4	*	(40	/	141)	=	-1.13475177
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Louis G. Zeyen Elementary											-10

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-49	-25	-15	-3	-10	-102.0	-20.4

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 30.6

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -71.4

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:

	2015	2016	2017	2018	2019
Percent	81%	75%	69%	70%	71%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file