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	98492	2396	-	2436	=	-40	*	(51	/	171)	=	-11.92982456
4	98493	2393	-	2485	=	-92	*	(47	/	171)	=	-25.28654969
5	98496	2442	-	2528	=	-86	*	(41	/	171)	=	-20.61988297
6	98497	2442	-	2552	=	-110	*	(32	/	171)	=	-20.58479522
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for La Escuelita Elementary											-78

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	2784	2402	-	2436	=	-34	*	(44	/	187)	=	-7.99999998
4	2785	2432	-	2485	=	-53	*	(51	/	187)	=	-14.45454542
5	2787	2453	-	2528	=	-75	*	(39	/	187)	=	-15.64171118
6	2790	2431	-	2552	=	-121	*	(26	/	187)	=	-16.82352939
7	2792	2484	-	2567	=	-83	*	(27	/	187)	=	-11.98395716
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for La Escuelita Elementary											-67

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	2857	2403	-	2436	=	-33	*	(48	/	215)	=	-7.36744183
4	2860	2427	-	2485	=	-58	*	(41	/	215)	=	-11.06046509
5	2861	2455	-	2528	=	-73	*	(50	/	215)	=	-16.97674415
6	2863	2416	-	2552	=	-136	*	(29	/	215)	=	-18.34418592
7	2865	2481	-	2567	=	-86	*	(26	/	215)	=	-10.39999995
8	2867	2440	-	2586	=	-146	*	(21	/	215)	=	-14.26046503
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for La Escuelita Elementary											-78

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	2858	2401	-	2436	=	-35	*	(39	/	223)	=	-6.12107622
4	2860	2433	-	2485	=	-52	*	(49	/	223)	=	-11.42600893
5	2862	2443	-	2528	=	-85	*	(40	/	223)	=	-15.24663675
6	2864	2440	-	2552	=	-112	*	(42	/	223)	=	-21.09417038
7	2866	2439	-	2567	=	-128	*	(29	/	223)	=	-16.6457399
8	2868	2466	-	2586	=	-120	*	(24	/	223)	=	-12.91479816
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for La Escuelita Elementary											-83

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	2884	2440	-	2436	=	4	*	(45	/	219)	=	0.82191781
4	2885	2443	-	2485	=	-42	*	(33	/	219)	=	-6.3287671
5	2886	2460	-	2528	=	-68	*	(46	/	219)	=	-14.28310502
6	2887	2458	-	2552	=	-94	*	(32	/	219)	=	-13.73515977
7	2888	2466	-	2567	=	-101	*	(36	/	219)	=	-16.60273966
8	2889	2417	-	2586	=	-169	*	(27	/	219)	=	-20.8356164
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for La Escuelita Elementary											-71

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-78	-67	-78	-83	-71	-377.0	-75.4

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -57.4

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -93.4

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	91%	87%	89%	91%	91%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file