Marina Middle (Data source)
Source data for Marina 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 | 2378540 | 2515 | - | 2552 | = | -37 | * | (281 | / | 756) | = | -13.75264548 | ||
| 7 | 2378543 | 2530 | - | 2567 | = | -37 | * | (234 | / | 756) | = | -11.45238093 | ||
| 8 | 2378544 | 2565 | - | 2586 | = | -21 | * | (241 | / | 756) | = | -6.69444443 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Marina Middle | -32 | ||||||||||||
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 | 72635 | 2542 | - | 2552 | = | -10 | * | (250 | / | 755) | = | -3.31125827 | ||
| 7 | 72638 | 2551 | - | 2567 | = | -16 | * | (276 | / | 755) | = | -5.84900661 | ||
| 8 | 72640 | 2571 | - | 2586 | = | -15 | * | (229 | / | 755) | = | -4.54966887 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Marina Middle | -14 | ||||||||||||
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 | 74607 | 2535 | - | 2552 | = | -17 | * | (256 | / | 765) | = | -5.68888887 | ||
| 7 | 74609 | 2586 | - | 2567 | = | 19 | * | (244 | / | 765) | = | 6.06013071 | ||
| 8 | 74611 | 2604 | - | 2586 | = | 18 | * | (265 | / | 765) | = | 6.2352941 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Marina Middle | 7 | ||||||||||||
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 | 74782 | 2524 | - | 2552 | = | -28 | * | (271 | / | 779) | = | -9.74069317 | ||
| 7 | 74783 | 2559 | - | 2567 | = | -8 | * | (263 | / | 779) | = | -2.70089858 | ||
| 8 | 74786 | 2612 | - | 2586 | = | 26 | * | (245 | / | 779) | = | 8.17715018 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Marina Middle | -4 | ||||||||||||
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 | 75307 | 2532 | - | 2552 | = | -20 | * | (261 | / | 778) | = | -6.70951156 | ||
| 7 | 75308 | 2568 | - | 2567 | = | 1 | * | (257 | / | 778) | = | 0.33033419 | ||
| 8 | 75309 | 2570 | - | 2586 | = | -16 | * | (260 | / | 778) | = | -5.3470437 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Marina Middle | -12 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -32 | -14 | 7 | -4 | -12 | -55.0 | -11.0 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 31.0
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -53.0
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% | 78% | 64% | 68% | 71% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
San Francisco Unified school district | County of San Francisco
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.
Marina Middle math proficiency
Zero+ meets standard.
64% less $meal
62% less $meal
53% less $meal
57% less $meal
56% 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.