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	1470462	2427	-	2436	=	-9	*	(103	/	307)	=	-3.01954397
4	1470465	2452	-	2485	=	-33	*	(62	/	307)	=	-6.6644951
5	1470466	2469	-	2528	=	-59	*	(78	/	307)	=	-14.990228
6	1470469	2501	-	2552	=	-51	*	(64	/	307)	=	-10.63192181
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Ernest O. Lawrence Elementary											-35

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	46172	2453	-	2436	=	17	*	(82	/	324)	=	4.30246912
4	46175	2462	-	2485	=	-23	*	(97	/	324)	=	-6.88580247
5	46177	2483	-	2528	=	-45	*	(66	/	324)	=	-9.16666664
6	46179	2543	-	2552	=	-9	*	(79	/	324)	=	-2.19444444
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Ernest O. Lawrence Elementary											-14

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	47414	2455	-	2436	=	19	*	(58	/	287)	=	3.83972125
4	47417	2479	-	2485	=	-6	*	(80	/	287)	=	-1.67247386
5	47419	2466	-	2528	=	-62	*	(88	/	287)	=	-19.01045296
6	47420	2543	-	2552	=	-9	*	(61	/	287)	=	-1.91289199
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Ernest O. Lawrence Elementary											-19

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	47424	2459	-	2436	=	23	*	(59	/	263)	=	5.1596958
4	47427	2510	-	2485	=	25	*	(54	/	263)	=	5.13307983
5	47428	2503	-	2528	=	-25	*	(70	/	263)	=	-6.65399238
6	47431	2529	-	2552	=	-23	*	(80	/	263)	=	-6.99619771
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Ernest O. Lawrence Elementary											-3

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	47604	2421	-	2436	=	-15	*	(77	/	276)	=	-4.18478261
4	47605	2501	-	2485	=	16	*	(62	/	276)	=	3.5942029
5	47606	2499	-	2528	=	-29	*	(59	/	276)	=	-6.19927534
6	47607	2548	-	2552	=	-4	*	(78	/	276)	=	-1.13043478
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Ernest O. Lawrence Elementary											-8

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-35	-14	-19	-3	-8	-79.0	-15.8

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 20.2

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -51.8

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	82%	77%	75%	78%	77%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file