Knox Middle (Data source)
Source data for Knox Middle
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 |
||
| 6 | 2230351 | 2408 | - | 2552 | = | -144 | * | (176 | / | 533) | = | -47.54971843 | ||
| 7 | 2230354 | 2437 | - | 2567 | = | -130 | * | (158 | / | 533) | = | -38.53658536 | ||
| 8 | 2230355 | 2461 | - | 2586 | = | -125 | * | (199 | / | 533) | = | -46.6697935 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Knox Middle | -133 | ||||||||||||
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 |
||
| 6 | 68413 | 2413 | - | 2552 | = | -139 | * | (180 | / | 534) | = | -46.85393249 | ||
| 7 | 68415 | 2441 | - | 2567 | = | -126 | * | (189 | / | 534) | = | -44.59550558 | ||
| 8 | 68418 | 2463 | - | 2586 | = | -123 | * | (165 | / | 534) | = | -38.00561797 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Knox Middle | -129 | ||||||||||||
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 |
||
| 6 | 70237 | 2404 | - | 2552 | = | -148 | * | (180 | / | 582) | = | -45.7731958 | ||
| 7 | 70239 | 2424 | - | 2567 | = | -143 | * | (208 | / | 582) | = | -51.10652919 | ||
| 8 | 70240 | 2432 | - | 2586 | = | -154 | * | (194 | / | 582) | = | -51.33333328 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Knox Middle | -148 | ||||||||||||
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 |
||
| 6 | 70367 | 2407 | - | 2552 | = | -145 | * | (208 | / | 594) | = | -50.77441075 | ||
| 7 | 70370 | 2431 | - | 2567 | = | -136 | * | (181 | / | 594) | = | -41.44107734 | ||
| 8 | 70371 | 2418 | - | 2586 | = | -168 | * | (205 | / | 594) | = | -57.97979796 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Knox Middle | -150 | ||||||||||||
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 |
||
| 6 | 70883 | 2400 | - | 2552 | = | -152 | * | (192 | / | 583) | = | -50.05831899 | ||
| 7 | 70884 | 2421 | - | 2567 | = | -146 | * | (207 | / | 583) | = | -51.83876496 | ||
| 8 | 70885 | 2436 | - | 2586 | = | -150 | * | (184 | / | 583) | = | -47.34133785 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Knox Middle | -149 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -133 | -129 | -148 | -150 | -149 | -709.0 | -141.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -114.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -168.8
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 | 90% | 96% | 97% | 94% | 96% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
San Diego Unified school district | County of San Diego
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.
Knox Middle math proficiency
Zero+ meets standard.
82% less $meal
87% less $meal
88% less $meal
87% less $meal
87% 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.