City of Angels (Data source)
Source data for City of Angels
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 | 867267 | 0 | - | 2436 | = | * | (4 | / | 305) | = | ||||
| 4 | 867270 | 0 | - | 2485 | = | * | (3 | / | 305) | = | ||||
| 5 | 867271 | 0 | - | 2528 | = | * | (6 | / | 305) | = | ||||
| 6 | 867274 | 2456 | - | 2552 | = | -96 | * | (18 | / | 305) | = | -5.66557373 | ||
| 7 | 867275 | 2476 | - | 2567 | = | -91 | * | (42 | / | 305) | = | -12.53114754 | ||
| 8 | 867278 | 2461 | - | 2586 | = | -125 | * | (79 | / | 305) | = | -32.37704913 | ||
| 11 | 867279 | 2488 | - | 2628 | = | -140 | * | (153 | / | 305) | = | -70.22950816 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for City of Angels | -121 | ||||||||||||
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 | 27427 | 0 | - | 2436 | = | * | (8 | / | 503) | = | ||||
| 4 | 27428 | 2403 | - | 2485 | = | -82 | * | (13 | / | 503) | = | -2.11928426 | ||
| 5 | 27430 | 0 | - | 2528 | = | * | (9 | / | 503) | = | ||||
| 6 | 27432 | 2457 | - | 2552 | = | -95 | * | (39 | / | 503) | = | -7.36580515 | ||
| 7 | 27435 | 2460 | - | 2567 | = | -107 | * | (82 | / | 503) | = | -17.44333988 | ||
| 8 | 27436 | 2452 | - | 2586 | = | -134 | * | (132 | / | 503) | = | -35.1650099 | ||
| 11 | 27439 | 2482 | - | 2628 | = | -146 | * | (220 | / | 503) | = | -63.85685877 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for City of Angels | -126 | ||||||||||||
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 | 28005 | 0 | - | 2436 | = | * | (0 | / | 296) | = | ||||
| 4 | 28007 | 0 | - | 2485 | = | * | (0 | / | 296) | = | ||||
| 5 | 28009 | 0 | - | 2528 | = | * | (0 | / | 296) | = | ||||
| 6 | 28011 | 2464 | - | 2552 | = | -88 | * | (21 | / | 296) | = | -6.24324316 | ||
| 7 | 28013 | 2457 | - | 2567 | = | -110 | * | (44 | / | 296) | = | -16.35135128 | ||
| 8 | 28015 | 2424 | - | 2586 | = | -162 | * | (94 | / | 296) | = | -51.44594585 | ||
| 11 | 28018 | 2486 | - | 2628 | = | -142 | * | (112 | / | 296) | = | -53.72972968 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for City of Angels | -128 | ||||||||||||
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 | 28057 | 0 | - | 2436 | = | * | (0 | / | 700) | = | ||||
| 4 | 28059 | 0 | - | 2485 | = | * | (0 | / | 700) | = | ||||
| 5 | 28061 | 0 | - | 2528 | = | * | (0 | / | 700) | = | ||||
| 6 | 28063 | 2468 | - | 2552 | = | -84 | * | (53 | / | 700) | = | -6.35999994 | ||
| 7 | 28065 | 2455 | - | 2567 | = | -112 | * | (96 | / | 700) | = | -15.35999998 | ||
| 8 | 28067 | 2440 | - | 2586 | = | -146 | * | (173 | / | 700) | = | -36.08285712 | ||
| 11 | 28069 | 2478 | - | 2628 | = | -150 | * | (349 | / | 700) | = | -74.7857142 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for City of Angels | -133 | ||||||||||||
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 | 28240 | 0 | - | 2436 | = | * | (7 | / | 708) | = | ||||
| 4 | 28241 | 0 | - | 2485 | = | * | (10 | / | 708) | = | ||||
| 5 | 28242 | 2447 | - | 2528 | = | -81 | * | (11 | / | 708) | = | -1.25847456 | ||
| 6 | 28243 | 2450 | - | 2552 | = | -102 | * | (56 | / | 708) | = | -8.06779659 | ||
| 7 | 28244 | 2448 | - | 2567 | = | -119 | * | (124 | / | 708) | = | -20.8418078 | ||
| 8 | 28245 | 2439 | - | 2586 | = | -147 | * | (192 | / | 708) | = | -39.86440668 | ||
| 11 | 28246 | 2481 | - | 2628 | = | -147 | * | (308 | / | 708) | = | -63.94915246 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for City of Angels | -134 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -121 | -126 | -128 | -133 | -134 | -642.0 | -128.4 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -113.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -143.4
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 | 48% | 63% | 76% | 75% | 74% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Los Angeles 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.
City of Angels math proficiency
Zero+ meets standard.
46% less $meal
57% less $meal
68% less $meal
70% less $meal
69% 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.