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	1544099	2401	-	2436	=	-35	*	(78	/	250)	=	-10.92
4	1544102	2448	-	2485	=	-37	*	(85	/	250)	=	-12.58
5	1544103	2461	-	2528	=	-67	*	(87	/	250)	=	-23.316
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Walker Elementary											-47

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	48388	2400	-	2436	=	-36	*	(76	/	236)	=	-11.59322033
4	48390	2441	-	2485	=	-44	*	(77	/	236)	=	-14.35593218
5	48392	2436	-	2528	=	-92	*	(83	/	236)	=	-32.35593218
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Walker Elementary											-58

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	49708	2442	-	2436	=	6	*	(75	/	220)	=	2.04545454
4	49710	2462	-	2485	=	-23	*	(77	/	220)	=	-8.05
5	49713	2472	-	2528	=	-56	*	(68	/	220)	=	-17.3090909
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Walker Elementary											-23

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	49723	2423	-	2436	=	-13	*	(72	/	210)	=	-4.45714285
4	49725	2497	-	2485	=	12	*	(69	/	210)	=	3.94285714
5	49727	2495	-	2528	=	-33	*	(69	/	210)	=	-10.84285712
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Walker Elementary											-11

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	49921	2441	-	2436	=	5	*	(63	/	190)	=	1.65789474
4	49922	2478	-	2485	=	-7	*	(63	/	190)	=	-2.32105263
5	49923	2499	-	2528	=	-29	*	(64	/	190)	=	-9.76842105
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Walker Elementary											-10

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-47	-58	-23	-11	-10	-149.0	-29.8

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 33.2

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -92.8

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	89%	98%	93%	88%	88%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file