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 |
2363668 |
2475 |
- |
2436 |
= |
39 |
* |
(85 |
/ |
252)
|
= |
13.15476189 |
| 4 |
2363671 |
2495 |
- |
2485 |
= |
10 |
* |
(83 |
/ |
252)
|
= |
3.29365079 |
| 5 |
2363672 |
2545 |
- |
2528 |
= |
17 |
* |
(84 |
/ |
252)
|
= |
5.66666666 |
| Step 4 |
SUM Weighted Distance From Standard to get
2015 Difference From Standard for Key (Francis Scott) Elementary
|
22 |
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 |
72215 |
2481 |
- |
2436 |
= |
45 |
* |
(88 |
/ |
253)
|
= |
15.65217387 |
| 4 |
72218 |
2511 |
- |
2485 |
= |
26 |
* |
(83 |
/ |
253)
|
= |
8.52964427 |
| 5 |
72219 |
2534 |
- |
2528 |
= |
6 |
* |
(82 |
/ |
253)
|
= |
1.94466403 |
| Step 4 |
SUM Weighted Distance From Standard to get
2016 Difference From Standard for Key (Francis Scott) Elementary
|
26 |
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 |
74190 |
2485 |
- |
2436 |
= |
49 |
* |
(85 |
/ |
272)
|
= |
15.3125 |
| 4 |
74192 |
2516 |
- |
2485 |
= |
31 |
* |
(93 |
/ |
272)
|
= |
10.59926468 |
| 5 |
74193 |
2553 |
- |
2528 |
= |
25 |
* |
(94 |
/ |
272)
|
= |
8.63970588 |
| Step 4 |
SUM Weighted Distance From Standard to get
2017 Difference From Standard for Key (Francis Scott) Elementary
|
35 |
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 |
74363 |
2495 |
- |
2436 |
= |
59 |
* |
(86 |
/ |
281)
|
= |
18.0569395 |
| 4 |
74366 |
2503 |
- |
2485 |
= |
18 |
* |
(97 |
/ |
281)
|
= |
6.21352312 |
| 5 |
74367 |
2548 |
- |
2528 |
= |
20 |
* |
(98 |
/ |
281)
|
= |
6.97508896 |
| Step 4 |
SUM Weighted Distance From Standard to get
2018 Difference From Standard for Key (Francis Scott) Elementary
|
31 |
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 |
74887 |
2484 |
- |
2436 |
= |
48 |
* |
(85 |
/ |
268)
|
= |
15.22388059 |
| 4 |
74888 |
2531 |
- |
2485 |
= |
46 |
* |
(88 |
/ |
268)
|
= |
15.10447757 |
| 5 |
74889 |
2543 |
- |
2528 |
= |
15 |
* |
(95 |
/ |
268)
|
= |
5.31716417 |
| Step 4 |
SUM Weighted Distance From Standard to get
2019 Difference From Standard for Key (Francis Scott) Elementary
|
36 |
Last steps
Compute the average
| 2015 |
2016 |
2017 |
2018 |
2019 |
Sum |
Average |
|
22
|
26
|
35
|
31
|
36
|
150.0 |
30.0 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 45.0
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: 15.0
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:
