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 |
2363157 |
2373 |
- |
2436 |
= |
-63 |
* |
(14 |
/ |
70)
|
= |
-12.6 |
| 4 |
2363158 |
2437 |
- |
2485 |
= |
-48 |
* |
(32 |
/ |
70)
|
= |
-21.94285714 |
| 5 |
2363161 |
2411 |
- |
2528 |
= |
-117 |
* |
(24 |
/ |
70)
|
= |
-40.11428561 |
| Step 4 |
SUM Weighted Distance From Standard to get
2015 Difference From Standard for Cobb (William L.) Elementary
|
-75 |
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 |
72200 |
2373 |
- |
2436 |
= |
-63 |
* |
(19 |
/ |
56)
|
= |
-21.37499998 |
| 4 |
72201 |
2451 |
- |
2485 |
= |
-34 |
* |
(12 |
/ |
56)
|
= |
-7.28571428 |
| 5 |
72204 |
2457 |
- |
2528 |
= |
-71 |
* |
(25 |
/ |
56)
|
= |
-31.69642854 |
| Step 4 |
SUM Weighted Distance From Standard to get
2016 Difference From Standard for Cobb (William L.) Elementary
|
-60 |
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 |
74173 |
2414 |
- |
2436 |
= |
-22 |
* |
(25 |
/ |
56)
|
= |
-9.82142856 |
| 4 |
74176 |
2456 |
- |
2485 |
= |
-29 |
* |
(16 |
/ |
56)
|
= |
-8.28571427 |
| 5 |
74178 |
2486 |
- |
2528 |
= |
-42 |
* |
(15 |
/ |
56)
|
= |
-11.24999996 |
| Step 4 |
SUM Weighted Distance From Standard to get
2017 Difference From Standard for Cobb (William L.) Elementary
|
-29 |
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 |
74348 |
0 |
- |
2436 |
= |
|
* |
(0 |
/ |
48)
|
= |
|
| 4 |
74349 |
2434 |
- |
2485 |
= |
-51 |
* |
(26 |
/ |
48)
|
= |
-27.62499997 |
| 5 |
74352 |
2446 |
- |
2528 |
= |
-82 |
* |
(13 |
/ |
48)
|
= |
-22.20833331 |
| Step 4 |
SUM Weighted Distance From Standard to get
2018 Difference From Standard for Cobb (William L.) Elementary
|
-50 |
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 |
74871 |
2390 |
- |
2436 |
= |
-46 |
* |
(17 |
/ |
47)
|
= |
-16.63829784 |
| 4 |
74872 |
0 |
- |
2485 |
= |
|
* |
(9 |
/ |
47)
|
= |
|
| 5 |
74873 |
2457 |
- |
2528 |
= |
-71 |
* |
(21 |
/ |
47)
|
= |
-31.72340421 |
| Step 4 |
SUM Weighted Distance From Standard to get
2019 Difference From Standard for Cobb (William L.) Elementary
|
-48 |
Last steps
Compute the average
| 2015 |
2016 |
2017 |
2018 |
2019 |
Sum |
Average |
|
-75
|
-60
|
-29
|
-50
|
-48
|
-262.0 |
-52.4 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -4.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -100.4
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:
