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 |
498481 |
2369 |
- |
2436 |
= |
-67 |
* |
(285 |
/ |
1599) |
= |
-11.9418386 |
4 |
498484 |
2402 |
- |
2485 |
= |
-83 |
* |
(269 |
/ |
1599) |
= |
-13.96310187 |
5 |
498485 |
2422 |
- |
2528 |
= |
-106 |
* |
(284 |
/ |
1599) |
= |
-18.82676664 |
6 |
498488 |
2465 |
- |
2552 |
= |
-87 |
* |
(268 |
/ |
1599) |
= |
-14.58161342 |
7 |
498489 |
2442 |
- |
2567 |
= |
-125 |
* |
(244 |
/ |
1599) |
= |
-19.0744215 |
8 |
498492 |
2482 |
- |
2586 |
= |
-104 |
* |
(249 |
/ |
1599) |
= |
-16.1951219 |
Step 4 |
SUM Weighted Distance From Standard to get
2015 Difference From Standard for Fairfax Elementary
|
-95 |
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 |
15831 |
2370 |
- |
2436 |
= |
-66 |
* |
(281 |
/ |
1676) |
= |
-11.0656324 |
4 |
15834 |
2420 |
- |
2485 |
= |
-65 |
* |
(296 |
/ |
1676) |
= |
-11.47971357 |
5 |
15835 |
2439 |
- |
2528 |
= |
-89 |
* |
(280 |
/ |
1676) |
= |
-14.86873507 |
6 |
15838 |
2461 |
- |
2552 |
= |
-91 |
* |
(290 |
/ |
1676) |
= |
-15.74582337 |
7 |
15839 |
2450 |
- |
2567 |
= |
-117 |
* |
(287 |
/ |
1676) |
= |
-20.03520285 |
8 |
15841 |
2466 |
- |
2586 |
= |
-120 |
* |
(242 |
/ |
1676) |
= |
-17.32696896 |
Step 4 |
SUM Weighted Distance From Standard to get
2016 Difference From Standard for Fairfax Elementary
|
-91 |
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 |
16152 |
2382 |
- |
2436 |
= |
-54 |
* |
(279 |
/ |
1735) |
= |
-8.68357346 |
4 |
16154 |
2419 |
- |
2485 |
= |
-66 |
* |
(284 |
/ |
1735) |
= |
-10.80345816 |
5 |
16156 |
2447 |
- |
2528 |
= |
-81 |
* |
(302 |
/ |
1735) |
= |
-14.0991354 |
6 |
16159 |
2463 |
- |
2552 |
= |
-89 |
* |
(283 |
/ |
1735) |
= |
-14.5170028 |
7 |
16161 |
2445 |
- |
2567 |
= |
-122 |
* |
(298 |
/ |
1735) |
= |
-20.95446685 |
8 |
16162 |
2461 |
- |
2586 |
= |
-125 |
* |
(289 |
/ |
1735) |
= |
-20.82132563 |
Step 4 |
SUM Weighted Distance From Standard to get
2017 Difference From Standard for Fairfax Elementary
|
-90 |
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 |
16172 |
2389 |
- |
2436 |
= |
-47 |
* |
(266 |
/ |
1703) |
= |
-7.34116265 |
4 |
16173 |
2432 |
- |
2485 |
= |
-53 |
* |
(281 |
/ |
1703) |
= |
-8.74515556 |
5 |
16176 |
2439 |
- |
2528 |
= |
-89 |
* |
(290 |
/ |
1703) |
= |
-15.1556077 |
6 |
16177 |
2480 |
- |
2552 |
= |
-72 |
* |
(295 |
/ |
1703) |
= |
-12.47210798 |
7 |
16179 |
2452 |
- |
2567 |
= |
-115 |
* |
(284 |
/ |
1703) |
= |
-19.1779213 |
8 |
16181 |
2460 |
- |
2586 |
= |
-126 |
* |
(287 |
/ |
1703) |
= |
-21.23429238 |
Step 4 |
SUM Weighted Distance From Standard to get
2018 Difference From Standard for Fairfax Elementary
|
-84 |
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 |
16304 |
2399 |
- |
2436 |
= |
-37 |
* |
(316 |
/ |
1736) |
= |
-6.73502301 |
4 |
16305 |
2439 |
- |
2485 |
= |
-46 |
* |
(268 |
/ |
1736) |
= |
-7.10138248 |
5 |
16306 |
2454 |
- |
2528 |
= |
-74 |
* |
(283 |
/ |
1736) |
= |
-12.06336404 |
6 |
16307 |
2477 |
- |
2552 |
= |
-75 |
* |
(288 |
/ |
1736) |
= |
-12.44239628 |
7 |
16308 |
2458 |
- |
2567 |
= |
-109 |
* |
(294 |
/ |
1736) |
= |
-18.45967734 |
8 |
16309 |
2474 |
- |
2586 |
= |
-112 |
* |
(287 |
/ |
1736) |
= |
-18.51612896 |
Step 4 |
SUM Weighted Distance From Standard to get
2019 Difference From Standard for Fairfax Elementary
|
-75 |
Last steps
Compute the average
2015 |
2016 |
2017 |
2018 |
2019 |
Sum |
Average |
-95
|
-91
|
-90
|
-84
|
-75
|
-435.0 |
-87.0 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -66.0
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -108.0
For the lines, you have the data necessary to plot the chart.