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	342243	2389	-	2436	=	-47	*	(142	/	519)	=	-12.85934485
4	342244	2422	-	2485	=	-63	*	(135	/	519)	=	-16.38728318
5	342247	2464	-	2528	=	-64	*	(124	/	519)	=	-15.29094406
6	342248	2477	-	2552	=	-75	*	(118	/	519)	=	-17.0520231
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Edith B. Storey Elementary											-62

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	10198	2417	-	2436	=	-19	*	(125	/	525)	=	-4.52380952
4	10200	2442	-	2485	=	-43	*	(145	/	525)	=	-11.87619047
5	10202	2457	-	2528	=	-71	*	(135	/	525)	=	-18.25714285
6	10204	2477	-	2552	=	-75	*	(120	/	525)	=	-17.1428571
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Edith B. Storey 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	10525	2448	-	2436	=	12	*	(135	/	528)	=	3.06818182
4	10528	2448	-	2485	=	-37	*	(126	/	528)	=	-8.82954543
5	10530	2456	-	2528	=	-72	*	(142	/	528)	=	-19.3636363
6	10531	2468	-	2552	=	-84	*	(125	/	528)	=	-19.88636362
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Edith B. Storey Elementary											-45

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	10537	2454	-	2436	=	18	*	(120	/	517)	=	4.17794971
4	10540	2474	-	2485	=	-11	*	(136	/	517)	=	-2.89361701
5	10541	2469	-	2528	=	-59	*	(122	/	517)	=	-13.92263055
6	10544	2497	-	2552	=	-55	*	(139	/	517)	=	-14.787234
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Edith B. Storey Elementary											-27

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	10618	2466	-	2436	=	30	*	(137	/	519)	=	7.91907513
4	10619	2463	-	2485	=	-22	*	(122	/	519)	=	-5.17148361
5	10620	2485	-	2528	=	-43	*	(139	/	519)	=	-11.51637765
6	10621	2513	-	2552	=	-39	*	(121	/	519)	=	-9.09248555
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Edith B. Storey Elementary											-18

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-62	-52	-45	-27	-18	-204.0	-40.8

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 13.2

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -94.8

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	84%	84%	89%	88%	88%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file