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	323212	2365	-	2436	=	-71	*	(97	/	313)	=	-22.00319486
4	323213	2387	-	2485	=	-98	*	(85	/	313)	=	-26.61341851
5	323215	2405	-	2528	=	-123	*	(64	/	313)	=	-25.15015969
6	323218	2442	-	2552	=	-110	*	(67	/	313)	=	-23.54632577
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Del Mar Elementary											-97

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	9643	2398	-	2436	=	-38	*	(68	/	305)	=	-8.47213112
4	9646	2408	-	2485	=	-77	*	(92	/	305)	=	-23.22622949
5	9647	2444	-	2528	=	-84	*	(88	/	305)	=	-24.23606556
6	9649	2433	-	2552	=	-119	*	(57	/	305)	=	-22.23934416
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Del Mar Elementary											-78

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	9971	2391	-	2436	=	-45	*	(85	/	314)	=	-12.18152862
4	9973	2428	-	2485	=	-57	*	(68	/	314)	=	-12.34394901
5	9976	2477	-	2528	=	-51	*	(80	/	314)	=	-12.99363057
6	9978	2459	-	2552	=	-93	*	(81	/	314)	=	-23.99044582
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Del Mar Elementary											-62

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	9989	2393	-	2436	=	-43	*	(82	/	299)	=	-11.79264211
4	9991	2435	-	2485	=	-50	*	(81	/	299)	=	-13.5451505
5	9993	2471	-	2528	=	-57	*	(66	/	299)	=	-12.58193975
6	9995	2487	-	2552	=	-65	*	(70	/	299)	=	-15.21739128
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Del Mar Elementary											-53

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	10070	2393	-	2436	=	-43	*	(74	/	303)	=	-10.50165015
4	10071	2454	-	2485	=	-31	*	(78	/	303)	=	-7.980198
5	10072	2469	-	2528	=	-59	*	(89	/	303)	=	-17.33003295
6	10073	2492	-	2552	=	-60	*	(62	/	303)	=	-12.27722772
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Del Mar Elementary											-48

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-97	-78	-62	-53	-48	-338.0	-67.6

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -7.6

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -127.6

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	95%	92%	96%	96%	94%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file