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	2244848	2416	-	2436	=	-20	*	(26	/	77)	=	-6.75324674
4	2244849	2471	-	2485	=	-14	*	(28	/	77)	=	-5.09090908
5	2244852	2486	-	2528	=	-42	*	(23	/	77)	=	-12.54545452
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Cubberley Elementary											-24

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	68903	2469	-	2436	=	33	*	(22	/	73)	=	9.94520548
4	68906	2465	-	2485	=	-20	*	(24	/	73)	=	-6.57534246
5	68907	2516	-	2528	=	-12	*	(27	/	73)	=	-4.43835616
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Cubberley Elementary											-1

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	70736	2432	-	2436	=	-4	*	(38	/	89)	=	-1.70786517
4	70738	2508	-	2485	=	23	*	(23	/	89)	=	5.94382022
5	70740	2519	-	2528	=	-9	*	(28	/	89)	=	-2.83146067
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Cubberley Elementary											1

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	70883	2453	-	2436	=	17	*	(20	/	86)	=	3.95348836
4	70886	2464	-	2485	=	-21	*	(35	/	86)	=	-8.54651162
5	70887	2524	-	2528	=	-4	*	(31	/	86)	=	-1.44186046
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Cubberley Elementary											-6

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	71371	2434	-	2436	=	-2	*	(21	/	70)	=	-0.6
4	71372	2480	-	2485	=	-5	*	(15	/	70)	=	-1.07142857
5	71373	2525	-	2528	=	-3	*	(34	/	70)	=	-1.45714286
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Cubberley Elementary											-3

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-24	-1	1	-6	-3	-33.0	-6.6

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 23.4

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -36.6

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	52%	62%	66%	58%	47%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file