Lexington Elementary (Data source)
Source data for Lexington 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 | 1093414 | 2411 | - | 2436 | = | -25 | * | (64 | / | 397) | = | -4.0302267 | ||
| 4 | 1093417 | 2435 | - | 2485 | = | -50 | * | (64 | / | 397) | = | -8.0604534 | ||
| 5 | 1093418 | 2445 | - | 2528 | = | -83 | * | (97 | / | 397) | = | -20.27959692 | ||
| 6 | 1093421 | 2513 | - | 2552 | = | -39 | * | (64 | / | 397) | = | -6.28715365 | ||
| 7 | 1093422 | 2511 | - | 2567 | = | -56 | * | (47 | / | 397) | = | -6.6297229 | ||
| 8 | 1093425 | 2547 | - | 2586 | = | -39 | * | (61 | / | 397) | = | -5.99244329 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Lexington Elementary | -51 | ||||||||||||
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 | 34221 | 2424 | - | 2436 | = | -12 | * | (67 | / | 371) | = | -2.16711589 | ||
| 4 | 34224 | 2477 | - | 2485 | = | -8 | * | (58 | / | 371) | = | -1.25067385 | ||
| 5 | 34225 | 2491 | - | 2528 | = | -37 | * | (62 | / | 371) | = | -6.18328837 | ||
| 6 | 34227 | 2493 | - | 2552 | = | -59 | * | (88 | / | 371) | = | -13.99460914 | ||
| 7 | 34229 | 2587 | - | 2567 | = | 20 | * | (54 | / | 371) | = | 2.9110512 | ||
| 8 | 34232 | 2616 | - | 2586 | = | 30 | * | (42 | / | 371) | = | 3.39622641 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Lexington Elementary | -17 | ||||||||||||
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 | 34833 | 2419 | - | 2436 | = | -17 | * | (69 | / | 383) | = | -3.06266317 | ||
| 4 | 34835 | 2469 | - | 2485 | = | -16 | * | (66 | / | 383) | = | -2.75718014 | ||
| 5 | 34838 | 2472 | - | 2528 | = | -56 | * | (63 | / | 383) | = | -9.21148822 | ||
| 6 | 34840 | 2483 | - | 2552 | = | -69 | * | (59 | / | 383) | = | -10.62924279 | ||
| 7 | 34841 | 2565 | - | 2567 | = | -2 | * | (78 | / | 383) | = | -0.4073107 | ||
| 8 | 34844 | 2643 | - | 2586 | = | 57 | * | (48 | / | 383) | = | 7.14360309 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Lexington Elementary | -19 | ||||||||||||
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 | 34844 | 2410 | - | 2436 | = | -26 | * | (75 | / | 400) | = | -4.875 | ||
| 4 | 34846 | 2478 | - | 2485 | = | -7 | * | (67 | / | 400) | = | -1.1725 | ||
| 5 | 34848 | 2485 | - | 2528 | = | -43 | * | (74 | / | 400) | = | -7.955 | ||
| 6 | 34850 | 2470 | - | 2552 | = | -82 | * | (59 | / | 400) | = | -12.095 | ||
| 7 | 34852 | 2579 | - | 2567 | = | 12 | * | (54 | / | 400) | = | 1.62 | ||
| 8 | 34854 | 2602 | - | 2586 | = | 16 | * | (71 | / | 400) | = | 2.84 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Lexington Elementary | -22 | ||||||||||||
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 | 35021 | 2414 | - | 2436 | = | -22 | * | (58 | / | 360) | = | -3.54444444 | ||
| 4 | 35022 | 2473 | - | 2485 | = | -12 | * | (66 | / | 360) | = | -2.2 | ||
| 5 | 35023 | 2497 | - | 2528 | = | -31 | * | (65 | / | 360) | = | -5.59722221 | ||
| 6 | 35024 | 2487 | - | 2552 | = | -65 | * | (69 | / | 360) | = | -12.45833329 | ||
| 7 | 35025 | 2589 | - | 2567 | = | 22 | * | (52 | / | 360) | = | 3.17777777 | ||
| 8 | 35026 | 2644 | - | 2586 | = | 58 | * | (50 | / | 360) | = | 8.0555555 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Lexington Elementary | -13 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -51 | -17 | -19 | -22 | -13 | -122.0 | -24.4 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 20.6
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -69.4
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:
| 2015 | 2016 | 2017 | 2018 | 2019 | |
|---|---|---|---|---|---|
| Percent | 94% | 94% | 94% | 94% | 94% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Pomona 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.
Lexington Elementary math proficiency
Zero+ meets standard.
80% less $meal
83% less $meal
76% less $meal
84% less $meal
84% 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.