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	62698	2455	-	2436	=	19	*	(57	/	179)	=	6.05027933
4	62701	2491	-	2485	=	6	*	(69	/	179)	=	2.31284916
5	62702	2495	-	2528	=	-33	*	(53	/	179)	=	-9.77094971
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Falcon Ridge Elementary											-1

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	62967	2459	-	2436	=	23	*	(82	/	224)	=	8.41964284
4	62968	2491	-	2485	=	6	*	(66	/	224)	=	1.76785714
5	62969	2502	-	2528	=	-26	*	(76	/	224)	=	-8.82142856
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Falcon Ridge Elementary											1

Last steps

Compute the average

2018	2019	Sum	Average
-1	1	0.0	0.0

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 3.0

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -3.0

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:

	2018	2019
Percent	43%	43%
Data source	2018 data file	2019 data file