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 |
2355353 |
2419 |
- |
2436 |
= |
-17 |
* |
(15 |
/ |
32)
|
= |
-7.96875 |
| 4 |
2355356 |
2483 |
- |
2485 |
= |
-2 |
* |
(11 |
/ |
32)
|
= |
-0.6875 |
| 5 |
2355357 |
0 |
- |
2528 |
= |
|
* |
(6 |
/ |
32)
|
= |
|
| Step 4 |
SUM Weighted Distance From Standard to get
2015 Difference From Standard for San Francisco Public Montessori
|
-9 |
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 |
71969 |
2463 |
- |
2436 |
= |
27 |
* |
(33 |
/ |
54)
|
= |
16.5 |
| 4 |
71971 |
2458 |
- |
2485 |
= |
-27 |
* |
(12 |
/ |
54)
|
= |
-5.99999999 |
| 5 |
71974 |
0 |
- |
2528 |
= |
|
* |
(9 |
/ |
54)
|
= |
|
| Step 4 |
SUM Weighted Distance From Standard to get
2016 Difference From Standard for San Francisco Public Montessori
|
11 |
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 |
73938 |
2435 |
- |
2436 |
= |
-1 |
* |
(34 |
/ |
73)
|
= |
-0.46575342 |
| 4 |
73940 |
2476 |
- |
2485 |
= |
-9 |
* |
(28 |
/ |
73)
|
= |
-3.45205479 |
| 5 |
73942 |
2494 |
- |
2528 |
= |
-34 |
* |
(11 |
/ |
73)
|
= |
-5.12328765 |
| Step 4 |
SUM Weighted Distance From Standard to get
2017 Difference From Standard for San Francisco Public Montessori
|
-9 |
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 |
74108 |
2480 |
- |
2436 |
= |
44 |
* |
(24 |
/ |
78)
|
= |
13.53846151 |
| 4 |
74109 |
2433 |
- |
2485 |
= |
-52 |
* |
(31 |
/ |
78)
|
= |
-20.66666664 |
| 5 |
74112 |
2490 |
- |
2528 |
= |
-38 |
* |
(23 |
/ |
78)
|
= |
-11.20512817 |
| Step 4 |
SUM Weighted Distance From Standard to get
2018 Difference From Standard for San Francisco Public Montessori
|
-18 |
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 |
74631 |
2448 |
- |
2436 |
= |
12 |
* |
(33 |
/ |
89)
|
= |
4.44943819 |
| 4 |
74632 |
2515 |
- |
2485 |
= |
30 |
* |
(29 |
/ |
89)
|
= |
9.77528088 |
| 5 |
74633 |
2490 |
- |
2528 |
= |
-38 |
* |
(27 |
/ |
89)
|
= |
-11.52808987 |
| Step 4 |
SUM Weighted Distance From Standard to get
2019 Difference From Standard for San Francisco Public Montessori
|
3 |
Last steps
Compute the average
| 2015 |
2016 |
2017 |
2018 |
2019 |
Sum |
Average |
|
-9
|
11
|
-9
|
-18
|
3
|
-22.0 |
-4.4 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 28.6
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -37.4
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:
