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	2139255	2395	-	2436	=	-41	*	(78	/	356)	=	-8.98314604
4	2139258	2460	-	2485	=	-25	*	(93	/	356)	=	-6.53089888
5	2139259	2482	-	2528	=	-46	*	(89	/	356)	=	-11.5
6	2139262	2477	-	2552	=	-75	*	(96	/	356)	=	-20.22471908
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Otay Elementary											-47

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	65673	2448	-	2436	=	12	*	(78	/	324)	=	2.88888888
4	65675	2467	-	2485	=	-18	*	(78	/	324)	=	-4.33333332
5	65677	2466	-	2528	=	-62	*	(89	/	324)	=	-17.0308642
6	65678	2484	-	2552	=	-68	*	(79	/	324)	=	-16.58024688
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Otay Elementary											-35

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	67491	2451	-	2436	=	15	*	(79	/	320)	=	3.703125
4	67493	2474	-	2485	=	-11	*	(71	/	320)	=	-2.440625
5	67494	2475	-	2528	=	-53	*	(82	/	320)	=	-13.58125
6	67497	2497	-	2552	=	-55	*	(88	/	320)	=	-15.125
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Otay Elementary											-27

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	67596	2424	-	2436	=	-12	*	(74	/	310)	=	-2.86451612
4	67599	2464	-	2485	=	-21	*	(87	/	310)	=	-5.89354838
5	67600	2495	-	2528	=	-33	*	(69	/	310)	=	-7.34516129
6	67603	2485	-	2552	=	-67	*	(80	/	310)	=	-17.29032257
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Otay Elementary											-33

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	68112	2424	-	2436	=	-12	*	(83	/	304)	=	-3.27631578
4	68113	2448	-	2485	=	-37	*	(69	/	304)	=	-8.39802631
5	68114	2470	-	2528	=	-58	*	(87	/	304)	=	-16.59868418
6	68115	2514	-	2552	=	-38	*	(65	/	304)	=	-8.12499998
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Otay Elementary											-36

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-47	-35	-27	-33	-36	-178.0	-35.6

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -14.6

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -56.6

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	81%	80%	81%	83%	87%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file