Bridgeport Elementary (Data source)
Source data for Bridgeport Elementary
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 | 1115190 | 2454 | - | 2436 | = | 18 | * | (142 | / | 597) | = | 4.28140703 | ||
| 4 | 1115191 | 2484 | - | 2485 | = | -1 | * | (140 | / | 597) | = | -0.23450586 | ||
| 5 | 1115194 | 2519 | - | 2528 | = | -9 | * | (157 | / | 597) | = | -2.36683417 | ||
| 6 | 1115195 | 2553 | - | 2552 | = | 1 | * | (158 | / | 597) | = | 0.26465662 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Bridgeport Elementary | 2 | ||||||||||||
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 | 34841 | 2481 | - | 2436 | = | 45 | * | (146 | / | 581) | = | 11.30808947 | ||
| 4 | 34844 | 2507 | - | 2485 | = | 22 | * | (139 | / | 581) | = | 5.26333907 | ||
| 5 | 34845 | 2538 | - | 2528 | = | 10 | * | (135 | / | 581) | = | 2.32358003 | ||
| 6 | 34848 | 2574 | - | 2552 | = | 22 | * | (161 | / | 581) | = | 6.09638553 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Bridgeport Elementary | 25 | ||||||||||||
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 | 35487 | 2474 | - | 2436 | = | 38 | * | (100 | / | 515) | = | 7.37864077 | ||
| 4 | 35489 | 2517 | - | 2485 | = | 32 | * | (140 | / | 515) | = | 8.69902912 | ||
| 5 | 35492 | 2526 | - | 2528 | = | -2 | * | (138 | / | 515) | = | -0.53592233 | ||
| 6 | 35494 | 2563 | - | 2552 | = | 11 | * | (137 | / | 515) | = | 2.92621359 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Bridgeport Elementary | 18 | ||||||||||||
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 | 35498 | 2468 | - | 2436 | = | 32 | * | (99 | / | 490) | = | 6.46530611 | ||
| 4 | 35500 | 2505 | - | 2485 | = | 20 | * | (100 | / | 490) | = | 4.08163264 | ||
| 5 | 35502 | 2537 | - | 2528 | = | 9 | * | (143 | / | 490) | = | 2.62653061 | ||
| 6 | 35504 | 2586 | - | 2552 | = | 34 | * | (148 | / | 490) | = | 10.26938774 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Bridgeport Elementary | 23 | ||||||||||||
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 | 35665 | 2472 | - | 2436 | = | 36 | * | (110 | / | 477) | = | 8.30188678 | ||
| 4 | 35666 | 2536 | - | 2485 | = | 51 | * | (108 | / | 477) | = | 11.54716979 | ||
| 5 | 35667 | 2534 | - | 2528 | = | 6 | * | (112 | / | 477) | = | 1.40880503 | ||
| 6 | 35668 | 2578 | - | 2552 | = | 26 | * | (147 | / | 477) | = | 8.0125786 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Bridgeport Elementary | 29 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 2 | 25 | 18 | 23 | 29 | 97.0 | 19.4 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 49.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -10.6
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:
| 2015 | 2016 | 2017 | 2018 | 2019 | |
|---|---|---|---|---|---|
| Percent | 9% | 10% | 10% | 14% | 15% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Saugus Union school district | County of Los Angeles
THIS chart shows what the school system "wants"
PLUS a "special" or "outside" cause of variation: wealth/poverty.
NOT what teachers want.
NOT what principals want.
NOT what parents want.
Bridgeport Elementary math proficiency
Zero+ meets standard.
7% less $meal
7% less $meal
7% less $meal
11% less $meal
13% less $meal
• Any result above zero is proficient; below is not proficient. • There is a 99% chance that results will remain the same in coming years, which is to say, between the Upper and Lower Control Limits (the gray lines). • The houses with the % of students receiving a Free or Reduced Price Meal is a measure of wealth/poverty.