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	329532	2369	-	2436	=	-67	*	(70	/	261)	=	-17.96934861
4	329535	2387	-	2485	=	-98	*	(70	/	261)	=	-26.28352483
5	329536	2387	-	2528	=	-141	*	(64	/	261)	=	-34.57471251
6	329539	2421	-	2552	=	-131	*	(57	/	261)	=	-28.60919532
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Muir Elementary											-107

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	9833	2392	-	2436	=	-44	*	(64	/	248)	=	-11.3548387
4	9835	2423	-	2485	=	-62	*	(69	/	248)	=	-17.24999997
5	9837	2400	-	2528	=	-128	*	(66	/	248)	=	-34.0645161
6	9839	2379	-	2552	=	-173	*	(49	/	248)	=	-34.18145159
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Muir Elementary											-97

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	10161	2363	-	2436	=	-73	*	(61	/	243)	=	-18.32510284
4	10164	2395	-	2485	=	-90	*	(63	/	243)	=	-23.33333331
5	10165	2390	-	2528	=	-138	*	(65	/	243)	=	-36.91358012
6	10168	2411	-	2552	=	-141	*	(54	/	243)	=	-31.3333333
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Muir Elementary											-110

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	10180	2395	-	2436	=	-41	*	(64	/	262)	=	-10.01526717
4	10182	2408	-	2485	=	-77	*	(66	/	262)	=	-19.39694649
5	10184	2438	-	2528	=	-90	*	(62	/	262)	=	-21.29770989
6	10186	2434	-	2552	=	-118	*	(70	/	262)	=	-31.5267175
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Muir Elementary											-82

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	10260	2368	-	2436	=	-68	*	(66	/	248)	=	-18.09677418
4	10261	2423	-	2485	=	-62	*	(70	/	248)	=	-17.49999997
5	10262	2412	-	2528	=	-116	*	(62	/	248)	=	-29.0
6	10263	2489	-	2552	=	-63	*	(50	/	248)	=	-12.70161289
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Muir Elementary											-77

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-107	-97	-110	-82	-77	-473.0	-94.6

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -52.6

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -136.6

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	98%	98%	97%	96%	95%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file