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	322211	2391	-	2436	=	-45	*	(77	/	351)	=	-9.87179486
4	322214	2401	-	2485	=	-84	*	(93	/	351)	=	-22.25641018
5	322215	2405	-	2528	=	-123	*	(93	/	351)	=	-32.58974347
6	322218	2436	-	2552	=	-116	*	(88	/	351)	=	-29.082621
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Calwa Elementary											-94

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	9613	2397	-	2436	=	-39	*	(85	/	340)	=	-9.75
4	9616	2406	-	2485	=	-79	*	(73	/	340)	=	-16.96176468
5	9618	2401	-	2528	=	-127	*	(89	/	340)	=	-33.24411754
6	9620	2444	-	2552	=	-108	*	(93	/	340)	=	-29.54117639
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Calwa Elementary											-89

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	9942	2392	-	2436	=	-44	*	(101	/	349)	=	-12.73352432
4	9944	2435	-	2485	=	-50	*	(84	/	349)	=	-12.03438395
5	9945	2430	-	2528	=	-98	*	(72	/	349)	=	-20.21776495
6	9947	2448	-	2552	=	-104	*	(92	/	349)	=	-27.41547276
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Calwa 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	9959	2385	-	2436	=	-51	*	(80	/	358)	=	-11.39664804
4	9962	2419	-	2485	=	-66	*	(113	/	358)	=	-20.83240223
5	9963	2441	-	2528	=	-87	*	(87	/	358)	=	-21.14245803
6	9966	2470	-	2552	=	-82	*	(78	/	358)	=	-17.86592171
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Calwa Elementary											-71

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	10040	2380	-	2436	=	-56	*	(117	/	396)	=	-16.54545452
4	10041	2451	-	2485	=	-34	*	(79	/	396)	=	-6.78282827
5	10042	2440	-	2528	=	-88	*	(115	/	396)	=	-25.55555552
6	10043	2470	-	2552	=	-82	*	(85	/	396)	=	-17.60101005
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Calwa Elementary											-66

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-94	-89	-72	-71	-66	-392.0	-78.4

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -42.4

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -114.4

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