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	1541873	2422	-	2436	=	-14	*	(180	/	494)	=	-5.10121457
4	1541874	2481	-	2485	=	-4	*	(169	/	494)	=	-1.36842105
5	1541877	2494	-	2528	=	-34	*	(145	/	494)	=	-9.97975708
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for John Muir Fundamental Elementary											-16

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	48307	2441	-	2436	=	5	*	(168	/	510)	=	1.64705882
4	48309	2477	-	2485	=	-8	*	(172	/	510)	=	-2.69803921
5	48311	2503	-	2528	=	-25	*	(170	/	510)	=	-8.33333333
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for John Muir Fundamental Elementary											-9

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	49635	2439	-	2436	=	3	*	(171	/	501)	=	1.0239521
4	49637	2487	-	2485	=	2	*	(167	/	501)	=	0.66666667
5	49638	2510	-	2528	=	-18	*	(163	/	501)	=	-5.85628742
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for John Muir Fundamental Elementary											-4

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	49648	2434	-	2436	=	-2	*	(136	/	479)	=	-0.56784969
4	49651	2505	-	2485	=	20	*	(176	/	479)	=	7.348643
5	49652	2535	-	2528	=	7	*	(167	/	479)	=	2.44050104
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for John Muir Fundamental Elementary											9

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	49847	2455	-	2436	=	19	*	(138	/	444)	=	5.90540539
4	49848	2484	-	2485	=	-1	*	(136	/	444)	=	-0.30630631
5	49849	2548	-	2528	=	20	*	(170	/	444)	=	7.65765764
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for John Muir Fundamental Elementary											13

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-16	-9	-4	9	13	-7.0	-1.4

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 34.6

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -37.4

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	74%	78%	70%	62%	62%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file