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	854444	2383	-	2436	=	-53	*	(43	/	158)	=	-14.42405059
4	854447	2411	-	2485	=	-74	*	(57	/	158)	=	-26.69620248
5	854448	2434	-	2528	=	-94	*	(58	/	158)	=	-34.50632906
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Mid-City's Prescott School of Enriched Sciences											-76

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	27027	2430	-	2436	=	-6	*	(38	/	151)	=	-1.50993377
4	27028	2446	-	2485	=	-39	*	(54	/	151)	=	-13.94701987
5	27030	2499	-	2528	=	-29	*	(59	/	151)	=	-11.3311258
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Mid-City's Prescott School of Enriched Sciences											-27

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	27606	2377	-	2436	=	-59	*	(46	/	160)	=	-16.9625
4	27608	2452	-	2485	=	-33	*	(56	/	160)	=	-11.55
5	27610	2452	-	2528	=	-76	*	(58	/	160)	=	-27.55
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Mid-City's Prescott School of Enriched Sciences											-56

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	27652	2416	-	2436	=	-20	*	(46	/	159)	=	-5.78616352
4	27655	2459	-	2485	=	-26	*	(56	/	159)	=	-9.15723268
5	27656	2477	-	2528	=	-51	*	(57	/	159)	=	-18.28301887
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Mid-City's Prescott School of Enriched Sciences											-33

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	27838	2444	-	2436	=	8	*	(45	/	161)	=	2.23602484
4	27839	2480	-	2485	=	-5	*	(57	/	161)	=	-1.77018634
5	27840	2468	-	2528	=	-60	*	(59	/	161)	=	-21.98757762
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Mid-City's Prescott School of Enriched Sciences											-22

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-76	-27	-56	-33	-22	-214.0	-42.8

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 23.2

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -108.8

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	73%	84%	88%	82%	78%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file