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	241548	2381	-	2436	=	-55	*	(91	/	361)	=	-13.86426591
4	241549	2407	-	2485	=	-78	*	(97	/	361)	=	-20.95844868
5	241552	2451	-	2528	=	-77	*	(86	/	361)	=	-18.34349024
6	241553	2497	-	2552	=	-55	*	(87	/	361)	=	-13.2548476
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Tara Hills Elementary											-66

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	7082	2408	-	2436	=	-28	*	(63	/	326)	=	-5.41104292
4	7084	2435	-	2485	=	-50	*	(89	/	326)	=	-13.6503067
5	7085	2461	-	2528	=	-67	*	(88	/	326)	=	-18.08588955
6	7087	2484	-	2552	=	-68	*	(86	/	326)	=	-17.93865024
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Tara Hills Elementary											-55

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	7294	2391	-	2436	=	-45	*	(72	/	327)	=	-9.90825687
4	7296	2424	-	2485	=	-61	*	(67	/	327)	=	-12.49847093
5	7297	2439	-	2528	=	-89	*	(96	/	327)	=	-26.12844031
6	7299	2467	-	2552	=	-85	*	(92	/	327)	=	-23.91437303
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Tara Hills Elementary											-72

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	7311	2387	-	2436	=	-49	*	(70	/	317)	=	-10.82018926
4	7314	2412	-	2485	=	-73	*	(70	/	317)	=	-16.1198738
5	7315	2468	-	2528	=	-60	*	(73	/	317)	=	-13.81703466
6	7318	2464	-	2552	=	-88	*	(104	/	317)	=	-28.87066239
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Tara Hills Elementary											-70

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	7362	2393	-	2436	=	-43	*	(52	/	251)	=	-8.9083665
4	7363	2407	-	2485	=	-78	*	(66	/	251)	=	-20.50996015
5	7364	2441	-	2528	=	-87	*	(68	/	251)	=	-23.56972106
6	7365	2500	-	2552	=	-52	*	(65	/	251)	=	-13.46613544
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Tara Hills Elementary											-66

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-66	-55	-72	-70	-66	-329.0	-65.8

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -47.8

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -83.8

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	72%	69%	68%	69%	70%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file