Cortez Elementary (Data source)
Source data for Cortez 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 | 1088858 | 2414 | - | 2436 | = | -22 | * | (88 | / | 528) | = | -3.66666665 | ||
| 4 | 1088861 | 2463 | - | 2485 | = | -22 | * | (87 | / | 528) | = | -3.62499999 | ||
| 5 | 1088862 | 2468 | - | 2528 | = | -60 | * | (89 | / | 528) | = | -10.11363636 | ||
| 6 | 1088865 | 2497 | - | 2552 | = | -55 | * | (87 | / | 528) | = | -9.06249999 | ||
| 7 | 1088866 | 2525 | - | 2567 | = | -42 | * | (88 | / | 528) | = | -6.99999997 | ||
| 8 | 1088869 | 2551 | - | 2586 | = | -35 | * | (89 | / | 528) | = | -5.89962121 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Cortez Elementary | -39 | ||||||||||||
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 | 34080 | 2429 | - | 2436 | = | -7 | * | (74 | / | 514) | = | -1.0077821 | ||
| 4 | 34082 | 2472 | - | 2485 | = | -13 | * | (93 | / | 514) | = | -2.35214008 | ||
| 5 | 34084 | 2486 | - | 2528 | = | -42 | * | (88 | / | 514) | = | -7.19066145 | ||
| 6 | 34086 | 2494 | - | 2552 | = | -58 | * | (91 | / | 514) | = | -10.26848246 | ||
| 7 | 34087 | 2543 | - | 2567 | = | -24 | * | (82 | / | 514) | = | -3.82879375 | ||
| 8 | 34090 | 2543 | - | 2586 | = | -43 | * | (86 | / | 514) | = | -7.19455253 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Cortez Elementary | -32 | ||||||||||||
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 | 34676 | 2431 | - | 2436 | = | -5 | * | (75 | / | 511) | = | -0.73385519 | ||
| 4 | 34678 | 2498 | - | 2485 | = | 13 | * | (77 | / | 511) | = | 1.9589041 | ||
| 5 | 34680 | 2481 | - | 2528 | = | -47 | * | (92 | / | 511) | = | -8.46183949 | ||
| 6 | 34681 | 2515 | - | 2552 | = | -37 | * | (87 | / | 511) | = | -6.29941291 | ||
| 7 | 34683 | 2524 | - | 2567 | = | -43 | * | (99 | / | 511) | = | -8.33072407 | ||
| 8 | 34686 | 2545 | - | 2586 | = | -41 | * | (81 | / | 511) | = | -6.49902152 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Cortez Elementary | -28 | ||||||||||||
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 | 34678 | 2439 | - | 2436 | = | 3 | * | (54 | / | 507) | = | 0.31952663 | ||
| 4 | 34680 | 2471 | - | 2485 | = | -14 | * | (91 | / | 507) | = | -2.51282051 | ||
| 5 | 34682 | 2509 | - | 2528 | = | -19 | * | (80 | / | 507) | = | -2.99802761 | ||
| 6 | 34684 | 2514 | - | 2552 | = | -38 | * | (95 | / | 507) | = | -7.12031555 | ||
| 7 | 34686 | 2506 | - | 2567 | = | -61 | * | (95 | / | 507) | = | -11.42998023 | ||
| 8 | 34688 | 2511 | - | 2586 | = | -75 | * | (92 | / | 507) | = | -13.60946745 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Cortez Elementary | -37 | ||||||||||||
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 | 34853 | 2454 | - | 2436 | = | 18 | * | (56 | / | 471) | = | 2.14012739 | ||
| 4 | 34854 | 2498 | - | 2485 | = | 13 | * | (64 | / | 471) | = | 1.76645435 | ||
| 5 | 34855 | 2473 | - | 2528 | = | -55 | * | (91 | / | 471) | = | -10.62632692 | ||
| 6 | 34856 | 2526 | - | 2552 | = | -26 | * | (77 | / | 471) | = | -4.25053078 | ||
| 7 | 34857 | 2519 | - | 2567 | = | -48 | * | (93 | / | 471) | = | -9.47770699 | ||
| 8 | 34858 | 2514 | - | 2586 | = | -72 | * | (90 | / | 471) | = | -13.75796174 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Cortez Elementary | -34 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -39 | -32 | -28 | -37 | -34 | -170.0 | -34.0 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -22.0
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -46.0
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 | 84% | 84% | 84% | 85% | 89% |
| 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.
Cortez Elementary math proficiency
Zero+ meets standard.
68% less $meal
69% less $meal
69% less $meal
75% less $meal
76% 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.