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	72141	2391	-	2436	=	-45	*	(52	/	158)	=	-14.81012658
4	72142	2407	-	2485	=	-78	*	(52	/	158)	=	-25.67088607
5	72145	2467	-	2528	=	-61	*	(54	/	158)	=	-20.84810121
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Think College Now											-61

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	1920	2352	-	2436	=	-84	*	(47	/	157)	=	-25.14649679
4	1922	2418	-	2485	=	-67	*	(62	/	157)	=	-26.45859869
5	1923	2439	-	2528	=	-89	*	(48	/	157)	=	-27.21019108
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Think College Now											-79

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	1978	2401	-	2436	=	-35	*	(53	/	175)	=	-10.59999997
4	1980	2414	-	2485	=	-71	*	(57	/	175)	=	-23.12571424
5	1981	2437	-	2528	=	-91	*	(65	/	175)	=	-33.79999996
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Think College Now											-68

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	1988	2396	-	2436	=	-40	*	(51	/	175)	=	-11.65714284
4	1990	2387	-	2485	=	-98	*	(63	/	175)	=	-35.28
5	1992	2447	-	2528	=	-81	*	(61	/	175)	=	-28.23428567
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Think College Now											-75

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	1997	2437	-	2436	=	1	*	(44	/	155)	=	0.28387097
4	1998	2446	-	2485	=	-39	*	(49	/	155)	=	-12.32903225
5	1999	2446	-	2528	=	-82	*	(62	/	155)	=	-32.8
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Think College Now											-45

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-61	-79	-68	-75	-45	-328.0	-65.6

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -26.6

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -104.6

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	84%	87%	89%	90%	92%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file