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	2138896	2406	-	2436	=	-30	*	(82	/	352)	=	-6.98863635
4	2138897	2427	-	2485	=	-58	*	(89	/	352)	=	-14.66477272
5	2138900	2482	-	2528	=	-46	*	(99	/	352)	=	-12.9375
6	2138901	2528	-	2552	=	-24	*	(82	/	352)	=	-5.59090908
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Tiffany (Burton C.) Elementary											-40

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	65662	2444	-	2436	=	8	*	(73	/	354)	=	1.64971751
4	65664	2466	-	2485	=	-19	*	(85	/	354)	=	-4.56214689
5	65666	2468	-	2528	=	-60	*	(97	/	354)	=	-16.44067794
6	65668	2545	-	2552	=	-7	*	(99	/	354)	=	-1.95762711
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Tiffany (Burton C.) Elementary											-21

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	67481	2454	-	2436	=	18	*	(71	/	292)	=	4.37671231
4	67482	2479	-	2485	=	-6	*	(65	/	292)	=	-1.33561643
5	67484	2500	-	2528	=	-28	*	(66	/	292)	=	-6.32876712
6	67486	2500	-	2552	=	-52	*	(90	/	292)	=	-16.02739726
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Tiffany (Burton C.) 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	67587	2441	-	2436	=	5	*	(55	/	256)	=	1.07421875
4	67589	2479	-	2485	=	-6	*	(71	/	256)	=	-1.6640625
5	67591	2488	-	2528	=	-40	*	(69	/	256)	=	-10.78125
6	67593	2552	-	2552	=	0	*	(61	/	256)	=	0.0
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Tiffany (Burton C.) Elementary											-11

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	68102	2481	-	2436	=	45	*	(59	/	262)	=	10.13358776
4	68103	2497	-	2485	=	12	*	(57	/	262)	=	2.61068701
5	68104	2499	-	2528	=	-29	*	(76	/	262)	=	-8.41221372
6	68105	2529	-	2552	=	-23	*	(70	/	262)	=	-6.14503816
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Tiffany (Burton C.) Elementary											-2

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-40	-21	-19	-11	-2	-93.0	-18.6

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 23.4

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -60.6

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	35%	37%	38%	40%	41%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file