Lewis (Ed C.) Elementary (Data source)
Source data for Lewis (Ed C.) 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 | 674611 | 2431 | - | 2436 | = | -5 | * | (144 | / | 337) | = | -2.13649852 | ||
| 4 | 674612 | 2478 | - | 2485 | = | -7 | * | (99 | / | 337) | = | -2.05637982 | ||
| 5 | 674615 | 2503 | - | 2528 | = | -25 | * | (94 | / | 337) | = | -6.97329375 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Lewis (Ed C.) Elementary | -11 | ||||||||||||
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 | 21349 | 2454 | - | 2436 | = | 18 | * | (141 | / | 365) | = | 6.95342464 | ||
| 4 | 21351 | 2483 | - | 2485 | = | -2 | * | (129 | / | 365) | = | -0.70684931 | ||
| 5 | 21353 | 2536 | - | 2528 | = | 8 | * | (95 | / | 365) | = | 2.08219178 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Lewis (Ed C.) Elementary | 8 | ||||||||||||
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 | 21757 | 2460 | - | 2436 | = | 24 | * | (145 | / | 373) | = | 9.3297587 | ||
| 4 | 21759 | 2494 | - | 2485 | = | 9 | * | (126 | / | 373) | = | 3.04021447 | ||
| 5 | 21762 | 2546 | - | 2528 | = | 18 | * | (102 | / | 373) | = | 4.92225201 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Lewis (Ed C.) Elementary | 17 | ||||||||||||
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 | 21732 | 2438 | - | 2436 | = | 2 | * | (135 | / | 403) | = | 0.66997519 | ||
| 4 | 21734 | 2491 | - | 2485 | = | 6 | * | (134 | / | 403) | = | 1.99503722 | ||
| 5 | 21736 | 2526 | - | 2528 | = | -2 | * | (134 | / | 403) | = | -0.66501241 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Lewis (Ed C.) Elementary | 2 | ||||||||||||
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 | 21902 | 2452 | - | 2436 | = | 16 | * | (138 | / | 415) | = | 5.32048192 | ||
| 4 | 21903 | 2482 | - | 2485 | = | -3 | * | (140 | / | 415) | = | -1.01204819 | ||
| 5 | 21904 | 2524 | - | 2528 | = | -4 | * | (137 | / | 415) | = | -1.32048192 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Lewis (Ed C.) Elementary | 3 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -11 | 8 | 17 | 2 | 3 | 19.0 | 3.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 33.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -26.2
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 | 72% | 73% | 73% | 71% | 73% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Downey Unified 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.
Lewis (Ed C.) Elementary math proficiency
Zero+ meets standard.
53% less $meal
56% less $meal
58% less $meal
58% less $meal
63% 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.