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 
11 
537987 
2490 
 
2628 
= 
138 
* 
(241 
/ 
241) 
= 
138.0 
Step 4 
SUM Weighted Distance From Standard to get
2015 Difference From Standard for Taft Union High

138 
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 
11 
17087 
2526 
 
2628 
= 
102 
* 
(251 
/ 
251) 
= 
102.0 
Step 4 
SUM Weighted Distance From Standard to get
2016 Difference From Standard for Taft Union High

102 
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 
11 
17407 
2509 
 
2628 
= 
119 
* 
(236 
/ 
236) 
= 
119.0 
Step 4 
SUM Weighted Distance From Standard to get
2017 Difference From Standard for Taft Union High

119 
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 
11 
17429 
2496 
 
2628 
= 
132 
* 
(222 
/ 
222) 
= 
132.0 
Step 4 
SUM Weighted Distance From Standard to get
2018 Difference From Standard for Taft Union High

132 
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 
11 
17569 
2504 
 
2628 
= 
124 
* 
(238 
/ 
238) 
= 
124.0 
Step 4 
SUM Weighted Distance From Standard to get
2019 Difference From Standard for Taft Union High

124 
Last steps
Compute the average
2015 
2016 
2017 
2018 
2019 
Sum 
Average 
138

102

119

132

124

615.0 
123.0 
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 84.0
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: 162.0
For the lines, you have the data necessary to plot the chart.