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	324281	2361	-	2436	=	-75	*	(125	/	410)	=	-22.8658536
4	324284	2394	-	2485	=	-91	*	(107	/	410)	=	-23.74878042
5	324285	2407	-	2528	=	-121	*	(78	/	410)	=	-23.01951214
6	324288	2434	-	2552	=	-118	*	(100	/	410)	=	-28.7804878
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Ewing Elementary											-98

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	9674	2386	-	2436	=	-50	*	(105	/	413)	=	-12.7118644
4	9676	2418	-	2485	=	-67	*	(121	/	413)	=	-19.62953994
5	9677	2427	-	2528	=	-101	*	(110	/	413)	=	-26.90072633
6	9679	2425	-	2552	=	-127	*	(77	/	413)	=	-23.67796598
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Ewing Elementary											-83

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	10001	2389	-	2436	=	-47	*	(114	/	425)	=	-12.60705882
4	10004	2457	-	2485	=	-28	*	(101	/	425)	=	-6.65411762
5	10005	2442	-	2528	=	-86	*	(102	/	425)	=	-20.64
6	10007	2469	-	2552	=	-83	*	(108	/	425)	=	-21.0917647
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Ewing Elementary											-61

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	10020	2412	-	2436	=	-24	*	(111	/	415)	=	-6.4192771
4	10022	2435	-	2485	=	-50	*	(111	/	415)	=	-13.37349395
5	10024	2461	-	2528	=	-67	*	(96	/	415)	=	-15.49879517
6	10025	2508	-	2552	=	-44	*	(97	/	415)	=	-10.28433732
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Ewing Elementary											-46

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	10100	2432	-	2436	=	-4	*	(105	/	411)	=	-1.02189781
4	10101	2478	-	2485	=	-7	*	(114	/	411)	=	-1.94160583
5	10102	2459	-	2528	=	-69	*	(104	/	411)	=	-17.45985398
6	10103	2527	-	2552	=	-25	*	(88	/	411)	=	-5.35279805
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Ewing Elementary											-26

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-98	-83	-61	-46	-26	-314.0	-62.8

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 21.2

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -146.8

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	92%	89%	91%	90%	88%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file