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	51781	2451	-	2436	=	15	*	(173	/	615)	=	4.2195122
4	51782	2491	-	2485	=	6	*	(179	/	615)	=	1.74634146
5	51784	2520	-	2528	=	-8	*	(144	/	615)	=	-1.87317073
6	51787	2533	-	2552	=	-19	*	(119	/	615)	=	-3.67642275
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Ronald Reagan Elementary											0

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	53283	2458	-	2436	=	22	*	(179	/	684)	=	5.75730993
4	53286	2494	-	2485	=	9	*	(174	/	684)	=	2.28947368
5	53287	2528	-	2528	=	0	*	(183	/	684)	=	0.0
6	53290	2572	-	2552	=	20	*	(148	/	684)	=	4.32748538
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Ronald Reagan Elementary											12

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	53375	2447	-	2436	=	11	*	(213	/	747)	=	3.13654618
4	53377	2503	-	2485	=	18	*	(179	/	747)	=	4.31325301
5	53379	2532	-	2528	=	4	*	(180	/	747)	=	0.96385542
6	53381	2560	-	2552	=	8	*	(175	/	747)	=	1.87416331
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Ronald Reagan Elementary											10

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	53612	2451	-	2436	=	15	*	(222	/	805)	=	4.13664596
4	53613	2493	-	2485	=	8	*	(216	/	805)	=	2.14658385
5	53614	2531	-	2528	=	3	*	(190	/	805)	=	0.70807453
6	53615	2569	-	2552	=	17	*	(177	/	805)	=	3.73788819
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Ronald Reagan Elementary											11

Last steps

Compute the average

2016	2017	2018	2019	Sum	Average
0	12	10	11	33.0	8.3

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 14.0

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: 8.0

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:

	2016	2017	2018	2019
Percent	27%	22%	25%	24%
Data source	2016 data file	2017 data file	2018 data file	2019 data file