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	2247960	2394	-	2436	=	-42	*	(46	/	174)	=	-11.10344827
4	2247961	2457	-	2485	=	-28	*	(66	/	174)	=	-10.62068963
5	2247964	2468	-	2528	=	-60	*	(62	/	174)	=	-21.37931034
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Foster Elementary											-43

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	68998	2427	-	2436	=	-9	*	(69	/	185)	=	-3.35675675
4	68999	2439	-	2485	=	-46	*	(46	/	185)	=	-11.43783781
5	69002	2496	-	2528	=	-32	*	(70	/	185)	=	-12.1081081
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Foster Elementary											-27

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	70830	2418	-	2436	=	-18	*	(52	/	169)	=	-5.53846153
4	70833	2475	-	2485	=	-10	*	(69	/	169)	=	-4.08284023
5	70835	2483	-	2528	=	-45	*	(48	/	169)	=	-12.78106506
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Foster Elementary											-22

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	70976	2431	-	2436	=	-5	*	(62	/	184)	=	-1.68478261
4	70978	2484	-	2485	=	-1	*	(56	/	184)	=	-0.30434783
5	70980	2508	-	2528	=	-20	*	(66	/	184)	=	-7.17391304
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Foster Elementary											-9

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	71463	2436	-	2436	=	0	*	(49	/	181)	=	0.0
4	71464	2483	-	2485	=	-2	*	(75	/	181)	=	-0.82872928
5	71465	2491	-	2528	=	-37	*	(57	/	181)	=	-11.6519337
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Foster Elementary											-12

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-43	-27	-22	-9	-12	-113.0	-22.6

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 16.4

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -61.6

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	56%	59%	54%	57%	58%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file