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 |
403171 |
2416 |
- |
2436 |
= |
-20 |
* |
(48 |
/ |
367) |
= |
-2.6158038 |
4 |
403172 |
2430 |
- |
2485 |
= |
-55 |
* |
(45 |
/ |
367) |
= |
-6.74386917 |
5 |
403175 |
2458 |
- |
2528 |
= |
-70 |
* |
(46 |
/ |
367) |
= |
-8.77384193 |
6 |
403176 |
2554 |
- |
2552 |
= |
2 |
* |
(65 |
/ |
367) |
= |
0.35422343 |
7 |
403179 |
2537 |
- |
2567 |
= |
-30 |
* |
(83 |
/ |
367) |
= |
-6.78474114 |
8 |
403180 |
2560 |
- |
2586 |
= |
-26 |
* |
(80 |
/ |
367) |
= |
-5.66757493 |
Step 4 |
SUM Weighted Distance From Standard to get
2015 Difference From Standard for Arcata Elementary
|
-30 |
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 |
12400 |
2433 |
- |
2436 |
= |
-3 |
* |
(53 |
/ |
351) |
= |
-0.45299145 |
4 |
12401 |
2451 |
- |
2485 |
= |
-34 |
* |
(52 |
/ |
351) |
= |
-5.03703703 |
5 |
12403 |
2496 |
- |
2528 |
= |
-32 |
* |
(37 |
/ |
351) |
= |
-3.37321936 |
6 |
12406 |
2511 |
- |
2552 |
= |
-41 |
* |
(54 |
/ |
351) |
= |
-6.30769227 |
7 |
12407 |
2548 |
- |
2567 |
= |
-19 |
* |
(74 |
/ |
351) |
= |
-4.00569799 |
8 |
12409 |
2565 |
- |
2586 |
= |
-21 |
* |
(81 |
/ |
351) |
= |
-4.84615383 |
Step 4 |
SUM Weighted Distance From Standard to get
2016 Difference From Standard for Arcata Elementary
|
-24 |
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 |
12733 |
2467 |
- |
2436 |
= |
31 |
* |
(41 |
/ |
338) |
= |
3.76035503 |
4 |
12735 |
2458 |
- |
2485 |
= |
-27 |
* |
(55 |
/ |
338) |
= |
-4.39349111 |
5 |
12737 |
2499 |
- |
2528 |
= |
-29 |
* |
(51 |
/ |
338) |
= |
-4.37573962 |
6 |
12738 |
2518 |
- |
2552 |
= |
-34 |
* |
(58 |
/ |
338) |
= |
-5.83431952 |
7 |
12740 |
2539 |
- |
2567 |
= |
-28 |
* |
(61 |
/ |
338) |
= |
-5.05325442 |
8 |
12743 |
2563 |
- |
2586 |
= |
-23 |
* |
(72 |
/ |
338) |
= |
-4.89940827 |
Step 4 |
SUM Weighted Distance From Standard to get
2017 Difference From Standard for Arcata Elementary
|
-21 |
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 |
12751 |
2439 |
- |
2436 |
= |
3 |
* |
(46 |
/ |
351) |
= |
0.39316239 |
4 |
12752 |
2475 |
- |
2485 |
= |
-10 |
* |
(42 |
/ |
351) |
= |
-1.19658119 |
5 |
12755 |
2506 |
- |
2528 |
= |
-22 |
* |
(55 |
/ |
351) |
= |
-3.44729343 |
6 |
12756 |
2516 |
- |
2552 |
= |
-36 |
* |
(71 |
/ |
351) |
= |
-7.28205127 |
7 |
12759 |
2546 |
- |
2567 |
= |
-21 |
* |
(67 |
/ |
351) |
= |
-4.00854699 |
8 |
12760 |
2531 |
- |
2586 |
= |
-55 |
* |
(70 |
/ |
351) |
= |
-10.96866095 |
Step 4 |
SUM Weighted Distance From Standard to get
2018 Difference From Standard for Arcata Elementary
|
-27 |
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 |
12880 |
2457 |
- |
2436 |
= |
21 |
* |
(43 |
/ |
357) |
= |
2.52941176 |
4 |
12881 |
2469 |
- |
2485 |
= |
-16 |
* |
(48 |
/ |
357) |
= |
-2.1512605 |
5 |
12882 |
2515 |
- |
2528 |
= |
-13 |
* |
(44 |
/ |
357) |
= |
-1.60224089 |
6 |
12883 |
2534 |
- |
2552 |
= |
-18 |
* |
(78 |
/ |
357) |
= |
-3.93277309 |
7 |
12884 |
2534 |
- |
2567 |
= |
-33 |
* |
(76 |
/ |
357) |
= |
-7.02521008 |
8 |
12885 |
2532 |
- |
2586 |
= |
-54 |
* |
(68 |
/ |
357) |
= |
-10.28571426 |
Step 4 |
SUM Weighted Distance From Standard to get
2019 Difference From Standard for Arcata Elementary
|
-22 |
Last steps
Compute the average
2015 |
2016 |
2017 |
2018 |
2019 |
Sum |
Average |
-30
|
-24
|
-21
|
-27
|
-22
|
-124.0 |
-24.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -15.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -33.8
For the lines, you have the data necessary to plot the chart.