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 |
973108 |
2360 |
- |
2436 |
= |
-76 |
* |
(51 |
/ |
174)
|
= |
-22.27586205 |
| 4 |
973111 |
2415 |
- |
2485 |
= |
-70 |
* |
(72 |
/ |
174)
|
= |
-28.96551721 |
| 5 |
973112 |
2435 |
- |
2528 |
= |
-93 |
* |
(51 |
/ |
174)
|
= |
-27.25862066 |
| Step 4 |
SUM Weighted Distance From Standard to get
2015 Difference From Standard for Virginia Road Elementary
|
-78 |
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 |
30795 |
2387 |
- |
2436 |
= |
-49 |
* |
(61 |
/ |
196)
|
= |
-15.24999996 |
| 4 |
30796 |
2412 |
- |
2485 |
= |
-73 |
* |
(71 |
/ |
196)
|
= |
-26.44387748 |
| 5 |
30799 |
2433 |
- |
2528 |
= |
-95 |
* |
(64 |
/ |
196)
|
= |
-31.02040814 |
| Step 4 |
SUM Weighted Distance From Standard to get
2016 Difference From Standard for Virginia Road Elementary
|
-73 |
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 |
31360 |
2380 |
- |
2436 |
= |
-56 |
* |
(53 |
/ |
182)
|
= |
-16.3076923 |
| 4 |
31361 |
2427 |
- |
2485 |
= |
-58 |
* |
(66 |
/ |
182)
|
= |
-21.032967 |
| 5 |
31364 |
2427 |
- |
2528 |
= |
-101 |
* |
(63 |
/ |
182)
|
= |
-34.96153845 |
| Step 4 |
SUM Weighted Distance From Standard to get
2017 Difference From Standard for Virginia Road Elementary
|
-72 |
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 |
31407 |
2408 |
- |
2436 |
= |
-28 |
* |
(47 |
/ |
159)
|
= |
-8.27672955 |
| 4 |
31409 |
2421 |
- |
2485 |
= |
-64 |
* |
(52 |
/ |
159)
|
= |
-20.9308176 |
| 5 |
31411 |
2448 |
- |
2528 |
= |
-80 |
* |
(60 |
/ |
159)
|
= |
-30.1886792 |
| Step 4 |
SUM Weighted Distance From Standard to get
2018 Difference From Standard for Virginia Road Elementary
|
-59 |
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 |
31584 |
2388 |
- |
2436 |
= |
-48 |
* |
(58 |
/ |
149)
|
= |
-18.68456371 |
| 4 |
31585 |
2396 |
- |
2485 |
= |
-89 |
* |
(43 |
/ |
149)
|
= |
-25.68456376 |
| 5 |
31586 |
2466 |
- |
2528 |
= |
-62 |
* |
(48 |
/ |
149)
|
= |
-19.97315436 |
| Step 4 |
SUM Weighted Distance From Standard to get
2019 Difference From Standard for Virginia Road Elementary
|
-64 |
Last steps
Compute the average
| 2015 |
2016 |
2017 |
2018 |
2019 |
Sum |
Average |
|
-78
|
-73
|
-72
|
-59
|
-64
|
-346.0 |
-69.2 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -48.2
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -90.2
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:
