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	328567	2418	-	2436	=	-18	*	(66	/	229)	=	-5.18777291
4	328568	2424	-	2485	=	-61	*	(54	/	229)	=	-14.38427946
5	328571	2433	-	2528	=	-95	*	(61	/	229)	=	-25.30567678
6	328572	2456	-	2552	=	-96	*	(48	/	229)	=	-20.12227066
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Lowell Elementary											-65

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	9803	2391	-	2436	=	-45	*	(65	/	227)	=	-12.88546254
4	9806	2445	-	2485	=	-40	*	(66	/	227)	=	-11.62995592
5	9808	2468	-	2528	=	-60	*	(41	/	227)	=	-10.8370044
6	9809	2468	-	2552	=	-84	*	(55	/	227)	=	-20.35242283
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Lowell Elementary											-56

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	10131	2443	-	2436	=	7	*	(67	/	219)	=	2.14155251
4	10134	2415	-	2485	=	-70	*	(59	/	219)	=	-18.85844744
5	10136	2476	-	2528	=	-52	*	(57	/	219)	=	-13.53424654
6	10137	2517	-	2552	=	-35	*	(36	/	219)	=	-5.75342464
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Lowell Elementary											-36

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	10150	2421	-	2436	=	-15	*	(66	/	237)	=	-4.17721518
4	10151	2490	-	2485	=	5	*	(64	/	237)	=	1.35021097
5	10154	2447	-	2528	=	-81	*	(54	/	237)	=	-18.45569618
6	10155	2526	-	2552	=	-26	*	(53	/	237)	=	-5.81434597
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Lowell 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	10230	2359	-	2436	=	-77	*	(71	/	248)	=	-22.04435479
4	10231	2463	-	2485	=	-22	*	(61	/	248)	=	-5.4112903
5	10232	2500	-	2528	=	-28	*	(63	/	248)	=	-7.11290322
6	10233	2481	-	2552	=	-71	*	(53	/	248)	=	-15.17338707
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Lowell Elementary											-50

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-65	-56	-36	-27	-50	-234.0	-46.8

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -1.8

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -91.8

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	98%	96%	98%	97%	95%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file