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	232717	2426	-	2436	=	-10	*	(58	/	206)	=	-2.81553398
4	232718	2437	-	2485	=	-48	*	(46	/	206)	=	-10.71844656
5	232721	2468	-	2528	=	-60	*	(50	/	206)	=	-14.56310676
6	232722	2484	-	2552	=	-68	*	(52	/	206)	=	-17.16504851
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Collins Elementary											-45

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	6823	2399	-	2436	=	-37	*	(46	/	194)	=	-8.77319587
4	6826	2465	-	2485	=	-20	*	(58	/	194)	=	-5.97938144
5	6828	2462	-	2528	=	-66	*	(41	/	194)	=	-13.9484536
6	6829	2479	-	2552	=	-73	*	(49	/	194)	=	-18.43814429
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Collins Elementary											-47

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	7035	2396	-	2436	=	-40	*	(44	/	172)	=	-10.23255812
4	7038	2462	-	2485	=	-23	*	(41	/	172)	=	-5.48255814
5	7040	2479	-	2528	=	-49	*	(54	/	172)	=	-15.38372091
6	7041	2453	-	2552	=	-99	*	(33	/	172)	=	-18.99418604
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Collins Elementary											-50

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	7053	2393	-	2436	=	-43	*	(44	/	181)	=	-10.45303865
4	7055	2468	-	2485	=	-17	*	(37	/	181)	=	-3.47513811
5	7057	2435	-	2528	=	-93	*	(46	/	181)	=	-23.63535908
6	7059	2487	-	2552	=	-65	*	(54	/	181)	=	-19.39226517
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Collins Elementary											-57

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	7100	2441	-	2436	=	5	*	(52	/	172)	=	1.51162791
4	7101	2411	-	2485	=	-74	*	(45	/	172)	=	-19.36046504
5	7102	2481	-	2528	=	-47	*	(29	/	172)	=	-7.9244186
6	7103	2494	-	2552	=	-58	*	(46	/	172)	=	-15.51162788
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Collins Elementary											-41

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-45	-47	-50	-57	-41	-240.0	-48.0

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -30.0

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -66.0

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	54%	57%	58%	62%	69%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file