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	2264392	2390	-	2436	=	-46	*	(27	/	97)	=	-12.80412369
4	2264393	2454	-	2485	=	-31	*	(30	/	97)	=	-9.58762885
5	2264396	2488	-	2528	=	-40	*	(40	/	97)	=	-16.49484536
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Wegeforth Elementary											-39

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	69479	2423	-	2436	=	-13	*	(23	/	86)	=	-3.47674418
4	69482	2447	-	2485	=	-38	*	(32	/	86)	=	-14.13953487
5	69484	2485	-	2528	=	-43	*	(31	/	86)	=	-15.49999999
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Wegeforth Elementary											-33

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	71313	2424	-	2436	=	-12	*	(40	/	90)	=	-5.33333333
4	71314	2442	-	2485	=	-43	*	(30	/	90)	=	-14.33333332
5	71316	2484	-	2528	=	-44	*	(20	/	90)	=	-9.77777777
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Wegeforth Elementary											-29

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	71458	2445	-	2436	=	9	*	(30	/	99)	=	2.72727273
4	71459	2446	-	2485	=	-39	*	(43	/	99)	=	-16.93939393
5	71462	2487	-	2528	=	-41	*	(26	/	99)	=	-10.76767674
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Wegeforth Elementary											-25

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	71943	2434	-	2436	=	-2	*	(40	/	119)	=	-0.67226891
4	71944	2480	-	2485	=	-5	*	(30	/	119)	=	-1.2605042
5	71945	2456	-	2528	=	-72	*	(49	/	119)	=	-29.64705876
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Wegeforth Elementary											-32

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-39	-33	-29	-25	-32	-158.0	-31.6

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -16.6

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -46.6

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	59%	65%	63%	59%	65%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file