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	842784	2371	-	2436	=	-65	*	(117	/	319)	=	-23.84012534
4	842787	2439	-	2485	=	-46	*	(76	/	319)	=	-10.95924764
5	842788	2457	-	2528	=	-71	*	(92	/	319)	=	-20.47648896
6	842791	2420	-	2552	=	-132	*	(34	/	319)	=	-14.0689655
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Gerald A. Lawson Academy of the Arts, Mathematics and Science											-69

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	26474	2379	-	2436	=	-57	*	(121	/	339)	=	-20.34513272
4	26477	2417	-	2485	=	-68	*	(115	/	339)	=	-23.06784658
5	26479	2438	-	2528	=	-90	*	(73	/	339)	=	-19.38053097
6	26480	2405	-	2552	=	-147	*	(30	/	339)	=	-13.00884953
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Gerald A. Lawson Academy of the Arts, Mathematics and Science											-76

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	26960	2391	-	2436	=	-45	*	(96	/	362)	=	-11.93370165
4	26962	2422	-	2485	=	-63	*	(124	/	362)	=	-21.58011047
5	26963	2428	-	2528	=	-100	*	(115	/	362)	=	-31.7679558
6	26965	2422	-	2552	=	-130	*	(27	/	362)	=	-9.69613255
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Gerald A. Lawson Academy of the Arts, Mathematics and Science											-75

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	26920	2405	-	2436	=	-31	*	(94	/	333)	=	-8.75075074
4	26922	2432	-	2485	=	-53	*	(91	/	333)	=	-14.48348347
5	26924	2427	-	2528	=	-101	*	(113	/	333)	=	-34.27327324
6	26926	2457	-	2552	=	-95	*	(35	/	333)	=	-9.98498498
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Gerald A. Lawson Academy of the Arts, Mathematics and Science											-67

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	27047	2370	-	2436	=	-66	*	(96	/	338)	=	-18.74556209
4	27048	2413	-	2485	=	-72	*	(94	/	338)	=	-20.02366858
5	27049	2429	-	2528	=	-99	*	(90	/	338)	=	-26.36094671
6	27050	2431	-	2552	=	-121	*	(58	/	338)	=	-20.76331359
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Gerald A. Lawson Academy of the Arts, Mathematics and Science											-86

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-69	-76	-75	-67	-86	-373.0	-74.6

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -53.6

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -95.6

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	88%	86%	84%	94%	95%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file