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	238008	2393	-	2436	=	-43	*	(70	/	243)	=	-12.38683125
4	238011	2458	-	2485	=	-27	*	(63	/	243)	=	-6.99999999
5	238012	2438	-	2528	=	-90	*	(61	/	243)	=	-22.59259254
6	238015	2504	-	2552	=	-48	*	(49	/	243)	=	-9.67901232
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Murphy Elementary											-52

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	6977	2393	-	2436	=	-43	*	(67	/	270)	=	-10.67037036
4	6980	2454	-	2485	=	-31	*	(65	/	270)	=	-7.46296294
5	6982	2446	-	2528	=	-82	*	(72	/	270)	=	-21.86666661
6	6984	2481	-	2552	=	-71	*	(66	/	270)	=	-17.35555552
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Murphy Elementary											-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	7190	2406	-	2436	=	-30	*	(70	/	278)	=	-7.55395683
4	7192	2445	-	2485	=	-40	*	(67	/	278)	=	-9.64028776
5	7194	2455	-	2528	=	-73	*	(68	/	278)	=	-17.85611507
6	7195	2497	-	2552	=	-55	*	(73	/	278)	=	-14.44244604
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Murphy Elementary											-49

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	7208	2389	-	2436	=	-47	*	(66	/	270)	=	-11.48888887
4	7209	2465	-	2485	=	-20	*	(67	/	270)	=	-4.96296296
5	7212	2459	-	2528	=	-69	*	(71	/	270)	=	-18.14444438
6	7213	2518	-	2552	=	-34	*	(66	/	270)	=	-8.3111111
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Murphy Elementary											-43

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	7256	2390	-	2436	=	-46	*	(63	/	248)	=	-11.68548387
4	7257	2423	-	2485	=	-62	*	(59	/	248)	=	-14.74999995
5	7258	2467	-	2528	=	-61	*	(62	/	248)	=	-15.25
6	7259	2464	-	2552	=	-88	*	(64	/	248)	=	-22.70967741
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Murphy Elementary											-64

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-52	-57	-49	-43	-64	-265.0	-53.0

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: -32.0

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -74.0

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:

	2015	2016	2017	2018	2019
Percent	68%	67%	64%	71%	69%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file