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	2131585	2385	-	2436	=	-51	*	(102	/	370)	=	-14.05945943
4	2131588	2467	-	2485	=	-18	*	(78	/	370)	=	-3.79459458
5	2131589	2462	-	2528	=	-66	*	(99	/	370)	=	-17.65945942
6	2131592	2476	-	2552	=	-76	*	(91	/	370)	=	-18.69189182
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Harborside Elementary											-54

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	65444	2383	-	2436	=	-53	*	(93	/	371)	=	-13.28571426
4	65447	2442	-	2485	=	-43	*	(107	/	371)	=	-12.40161723
5	65448	2472	-	2528	=	-56	*	(72	/	371)	=	-10.86792448
6	65450	2474	-	2552	=	-78	*	(99	/	371)	=	-20.81401616
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Harborside Elementary											-57

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	67261	2393	-	2436	=	-43	*	(101	/	381)	=	-11.39895011
4	67263	2443	-	2485	=	-42	*	(92	/	381)	=	-10.14173227
5	67265	2467	-	2528	=	-61	*	(115	/	381)	=	-18.41207347
6	67266	2502	-	2552	=	-50	*	(73	/	381)	=	-9.58005245
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Harborside Elementary											-50

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	67366	2382	-	2436	=	-54	*	(98	/	401)	=	-13.19700746
4	67369	2439	-	2485	=	-46	*	(93	/	401)	=	-10.66832915
5	67371	2431	-	2528	=	-97	*	(90	/	401)	=	-21.77057349
6	67373	2488	-	2552	=	-64	*	(120	/	401)	=	-19.15211968
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Harborside Elementary											-65

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	67882	2404	-	2436	=	-32	*	(94	/	370)	=	-8.12972973
4	67883	2443	-	2485	=	-42	*	(95	/	370)	=	-10.78378375
5	67884	2439	-	2528	=	-89	*	(90	/	370)	=	-21.64864863
6	67885	2479	-	2552	=	-73	*	(91	/	370)	=	-17.95405399
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Harborside Elementary											-59

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-54	-57	-50	-65	-59	-285.0	-57.0

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -42.0

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -72.0

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	87%	85%	84%	87%	89%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file