Cox Academy (Data source)
Source data for Cox Academy
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 | 3876 | 2349 | - | 2436 | = | -87 | * | (88 | / | 278) | = | -27.53956829 | ||
| 4 | 3877 | 2411 | - | 2485 | = | -74 | * | (98 | / | 278) | = | -26.08633089 | ||
| 5 | 3880 | 2438 | - | 2528 | = | -90 | * | (92 | / | 278) | = | -29.78417259 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Cox Academy | -83 | ||||||||||||
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 | 101 | 2372 | - | 2436 | = | -64 | * | (92 | / | 291) | = | -20.23367693 | ||
| 4 | 103 | 2407 | - | 2485 | = | -78 | * | (96 | / | 291) | = | -25.73195875 | ||
| 5 | 106 | 2434 | - | 2528 | = | -94 | * | (103 | / | 291) | = | -33.27147766 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Cox Academy | -79 | ||||||||||||
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 | 107 | 2390 | - | 2436 | = | -46 | * | (95 | / | 285) | = | -15.33333332 | ||
| 4 | 109 | 2422 | - | 2485 | = | -63 | * | (95 | / | 285) | = | -20.99999998 | ||
| 5 | 111 | 2429 | - | 2528 | = | -99 | * | (95 | / | 285) | = | -32.99999997 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Cox Academy | -69 | ||||||||||||
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 | 128 | 2391 | - | 2436 | = | -45 | * | (92 | / | 276) | = | -14.99999999 | ||
| 4 | 130 | 2428 | - | 2485 | = | -57 | * | (95 | / | 276) | = | -19.61956519 | ||
| 5 | 132 | 2444 | - | 2528 | = | -84 | * | (89 | / | 276) | = | -27.08695651 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Cox Academy | -62 | ||||||||||||
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 | 139 | 2361 | - | 2436 | = | -75 | * | (101 | / | 293) | = | -25.85324228 | ||
| 4 | 140 | 2418 | - | 2485 | = | -67 | * | (96 | / | 293) | = | -21.95221842 | ||
| 5 | 141 | 2431 | - | 2528 | = | -97 | * | (96 | / | 293) | = | -31.78156995 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Cox Academy | -80 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -83 | -79 | -69 | -62 | -80 | -373.0 | -74.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average:
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average:
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 | 93% | 87% | 40% | 93% | 90% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Alameda County Office of Education school district | County of Alameda
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.