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	977738	2390	-	2436	=	-46	*	(86	/	271)	=	-14.59778596
4	977741	2429	-	2485	=	-56	*	(97	/	271)	=	-20.04428042
5	977742	2423	-	2528	=	-105	*	(88	/	271)	=	-34.09594094
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Windsor Hills Math 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	30941	2423	-	2436	=	-13	*	(85	/	291)	=	-3.79725085
4	30943	2437	-	2485	=	-48	*	(97	/	291)	=	-15.99999998
5	30944	2430	-	2528	=	-98	*	(109	/	291)	=	-36.70790371
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Windsor Hills Math Science											-57

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	31504	2404	-	2436	=	-32	*	(80	/	280)	=	-9.14285712
4	31506	2439	-	2485	=	-46	*	(87	/	280)	=	-14.29285711
5	31507	2451	-	2528	=	-77	*	(113	/	280)	=	-31.07499996
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Windsor Hills Math Science											-55

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	31551	2397	-	2436	=	-39	*	(90	/	267)	=	-13.14606739
4	31552	2435	-	2485	=	-50	*	(89	/	267)	=	-16.66666665
5	31555	2460	-	2528	=	-68	*	(88	/	267)	=	-22.41198495
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Windsor Hills Math Science											-52

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	31728	2366	-	2436	=	-70	*	(88	/	281)	=	-21.92170813
4	31729	2429	-	2485	=	-56	*	(100	/	281)	=	-19.92882562
5	31730	2457	-	2528	=	-71	*	(93	/	281)	=	-23.49822063
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Windsor Hills Math Science											-65

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-69	-57	-55	-52	-65	-298.0	-59.6

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -38.6

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -80.6

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	71%	76%	88%	81%	81%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file