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	1536706	2384	-	2436	=	-52	*	(68	/	227)	=	-15.57709249
4	1536709	2420	-	2485	=	-65	*	(77	/	227)	=	-22.04845812
5	1536710	2442	-	2528	=	-86	*	(82	/	227)	=	-31.06607928
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Hoover Elementary											-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	48137	2384	-	2436	=	-52	*	(72	/	219)	=	-17.0958904
4	48138	2412	-	2485	=	-73	*	(70	/	219)	=	-23.33333332
5	48140	2446	-	2528	=	-82	*	(77	/	219)	=	-28.83105019
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Hoover Elementary											-69

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	49464	2393	-	2436	=	-43	*	(63	/	207)	=	-13.08695652
4	49467	2455	-	2485	=	-30	*	(75	/	207)	=	-10.8695652
5	49468	2466	-	2528	=	-62	*	(69	/	207)	=	-20.66666665
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Hoover Elementary											-45

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	49479	2396	-	2436	=	-40	*	(59	/	204)	=	-11.56862744
4	49480	2447	-	2485	=	-38	*	(64	/	204)	=	-11.92156862
5	49483	2473	-	2528	=	-55	*	(81	/	204)	=	-21.83823527
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Hoover Elementary											-45

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	49677	2443	-	2436	=	7	*	(52	/	173)	=	2.10404624
4	49678	2461	-	2485	=	-24	*	(55	/	173)	=	-7.6300578
5	49679	2474	-	2528	=	-54	*	(66	/	173)	=	-20.60115606
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Hoover Elementary											-26

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-69	-69	-45	-45	-26	-254.0	-50.8

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 3.2

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -104.8

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	86%	95%	89%	88%	90%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file