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	338679	2361	-	2436	=	-75	*	(86	/	323)	=	-19.96904018
4	338680	2381	-	2485	=	-104	*	(89	/	323)	=	-28.65634668
5	338683	2416	-	2528	=	-112	*	(83	/	323)	=	-28.78018573
6	338684	2443	-	2552	=	-109	*	(65	/	323)	=	-21.93498451
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for King Elementary											-99

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	10092	2371	-	2436	=	-65	*	(93	/	319)	=	-18.94984325
4	10094	2407	-	2485	=	-78	*	(70	/	319)	=	-17.11598741
5	10095	2399	-	2528	=	-129	*	(80	/	319)	=	-32.35109717
6	10098	2436	-	2552	=	-116	*	(76	/	319)	=	-27.63636362
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for King Elementary											-96

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	10419	2352	-	2436	=	-84	*	(77	/	302)	=	-21.41721851
4	10422	2399	-	2485	=	-86	*	(81	/	302)	=	-23.06622512
5	10424	2448	-	2528	=	-80	*	(63	/	302)	=	-16.68874168
6	10426	2444	-	2552	=	-108	*	(81	/	302)	=	-28.96688736
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for King Elementary											-90

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	10432	2361	-	2436	=	-75	*	(82	/	286)	=	-21.50349645
4	10434	2401	-	2485	=	-84	*	(61	/	286)	=	-17.91608389
5	10436	2427	-	2528	=	-101	*	(80	/	286)	=	-28.25174818
6	10438	2487	-	2552	=	-65	*	(63	/	286)	=	-14.3181818
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for King Elementary											-82

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	10512	2381	-	2436	=	-55	*	(82	/	321)	=	-14.04984422
4	10513	2393	-	2485	=	-92	*	(78	/	321)	=	-22.35514017
5	10514	2433	-	2528	=	-95	*	(72	/	321)	=	-21.30841118
6	10515	2442	-	2552	=	-110	*	(89	/	321)	=	-30.49844226
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for King Elementary											-88

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-99	-96	-90	-82	-88	-455.0	-91.0

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -73.0

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -109.0

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	98%	98%	99%	98%	97%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file