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	342601	2400	-	2436	=	-36	*	(135	/	443)	=	-10.97065462
4	342602	2453	-	2485	=	-32	*	(117	/	443)	=	-8.45146726
5	342605	2442	-	2528	=	-86	*	(98	/	443)	=	-19.02483065
6	342606	2486	-	2552	=	-66	*	(93	/	443)	=	-13.85553041
Step 4	SUM Weighted Distance From Standard to get 2015 Difference From Standard for Ann B. Leavenworth											-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	10208	2415	-	2436	=	-21	*	(120	/	451)	=	-5.58758315
4	10210	2456	-	2485	=	-29	*	(126	/	451)	=	-8.10199555
5	10211	2501	-	2528	=	-27	*	(112	/	451)	=	-6.70509976
6	10214	2499	-	2552	=	-53	*	(93	/	451)	=	-10.92904653
Step 4	SUM Weighted Distance From Standard to get 2016 Difference From Standard for Ann B. Leavenworth											-31

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	10536	2449	-	2436	=	13	*	(121	/	457)	=	3.44201312
4	10537	2454	-	2485	=	-31	*	(110	/	457)	=	-7.46170676
5	10540	2477	-	2528	=	-51	*	(123	/	457)	=	-13.72647701
6	10542	2538	-	2552	=	-14	*	(103	/	457)	=	-3.15536105
Step 4	SUM Weighted Distance From Standard to get 2017 Difference From Standard for Ann B. Leavenworth											-21

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	10547	2442	-	2436	=	6	*	(116	/	461)	=	1.50976139
4	10550	2466	-	2485	=	-19	*	(124	/	461)	=	-5.11062906
5	10551	2492	-	2528	=	-36	*	(100	/	461)	=	-7.8091106
6	10554	2519	-	2552	=	-33	*	(121	/	461)	=	-8.66160521
Step 4	SUM Weighted Distance From Standard to get 2018 Difference From Standard for Ann B. Leavenworth											-20

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	10628	2455	-	2436	=	19	*	(116	/	442)	=	4.98642532
4	10629	2480	-	2485	=	-5	*	(113	/	442)	=	-1.27828054
5	10630	2497	-	2528	=	-31	*	(121	/	442)	=	-8.48642534
6	10631	2521	-	2552	=	-31	*	(92	/	442)	=	-6.45248868
Step 4	SUM Weighted Distance From Standard to get 2019 Difference From Standard for Ann B. Leavenworth											-11

Last steps

Compute the average

2015	2016	2017	2018	2019	Sum	Average
-52	-31	-21	-20	-11	-135.0	-27.0

Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: 18.0

Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: -72.0

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	82%	82%	82%	83%	83%
Data source	2015 data file	2016 data file	2017 data file	2018 data file	2019 data file