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	2132903	2399	-	2436	=	-37	*	(48	/	197)	=	-9.01522841
4	2132906	2423	-	2485	=	-62	*	(48	/	197)	=	-15.10659896
5	2132907	2474	-	2528	=	-54	*	(51	/	197)	=	-13.97969539
6	2132910	2519	-	2552	=	-33	*	(50	/	197)	=	-8.3756345
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Montgomery (John J.) Elementary											-46

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	65485	2396	-	2436	=	-40	*	(47	/	187)	=	-10.05347592
4	65487	2437	-	2485	=	-48	*	(44	/	187)	=	-11.29411762
5	65488	2469	-	2528	=	-59	*	(47	/	187)	=	-14.82887698
6	65491	2491	-	2552	=	-61	*	(49	/	187)	=	-15.98395719
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Montgomery (John J.) Elementary											-52

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	67301	2429	-	2436	=	-7	*	(50	/	182)	=	-1.92307692
4	67302	2435	-	2485	=	-50	*	(43	/	182)	=	-11.8131868
5	67304	2452	-	2528	=	-76	*	(39	/	182)	=	-16.28571426
6	67306	2473	-	2552	=	-79	*	(50	/	182)	=	-21.70329665
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Montgomery (John J.) Elementary											-52

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	67407	2398	-	2436	=	-38	*	(47	/	183)	=	-9.75956284
4	67408	2494	-	2485	=	9	*	(54	/	183)	=	2.6557377
5	67411	2472	-	2528	=	-56	*	(39	/	183)	=	-11.93442622
6	67412	2494	-	2552	=	-58	*	(43	/	183)	=	-13.62841527
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Montgomery (John J.) Elementary											-33

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	67922	2428	-	2436	=	-8	*	(49	/	194)	=	-2.02061855
4	67923	2455	-	2485	=	-30	*	(45	/	194)	=	-6.95876286
5	67924	2508	-	2528	=	-20	*	(57	/	194)	=	-5.87628864
6	67925	2495	-	2552	=	-57	*	(43	/	194)	=	-12.63402059
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Montgomery (John J.) Elementary											-27

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-46	-52	-52	-33	-27	-210.0	-42.0

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -9.0

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -75.0

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:

	2015	2016	2017	2018	2019
Percent	92%	92%	92%	97%	94%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file