Marston Middle (Data source)
Source data for Marston 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 | 2266786 | 2522 | - | 2552 | = | -30 | * | (256 | / | 718) | = | -10.69637883 | ||
| 7 | 2266787 | 2506 | - | 2567 | = | -61 | * | (225 | / | 718) | = | -19.11559885 | ||
| 8 | 2266790 | 2542 | - | 2586 | = | -44 | * | (237 | / | 718) | = | -14.52367686 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Marston Middle | -44 | ||||||||||||
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 | 69540 | 2510 | - | 2552 | = | -42 | * | (223 | / | 690) | = | -13.57391301 | ||
| 7 | 69542 | 2526 | - | 2567 | = | -41 | * | (252 | / | 690) | = | -14.97391303 | ||
| 8 | 69543 | 2540 | - | 2586 | = | -46 | * | (215 | / | 690) | = | -14.33333329 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Marston Middle | -43 | ||||||||||||
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 | 71372 | 2527 | - | 2552 | = | -25 | * | (204 | / | 670) | = | -7.61194028 | ||
| 7 | 71374 | 2522 | - | 2567 | = | -45 | * | (221 | / | 670) | = | -14.84328357 | ||
| 8 | 71377 | 2555 | - | 2586 | = | -31 | * | (245 | / | 670) | = | -11.33582087 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Marston Middle | -34 | ||||||||||||
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 | 71518 | 2527 | - | 2552 | = | -25 | * | (226 | / | 644) | = | -8.77329193 | ||
| 7 | 71520 | 2559 | - | 2567 | = | -8 | * | (196 | / | 644) | = | -2.43478261 | ||
| 8 | 71522 | 2545 | - | 2586 | = | -41 | * | (222 | / | 644) | = | -14.13354034 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Marston Middle | -25 | ||||||||||||
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 | 72003 | 2544 | - | 2552 | = | -8 | * | (218 | / | 622) | = | -2.80385852 | ||
| 7 | 72004 | 2550 | - | 2567 | = | -17 | * | (212 | / | 622) | = | -5.7942122 | ||
| 8 | 72005 | 2589 | - | 2586 | = | 3 | * | (192 | / | 622) | = | 0.92604502 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Marston Middle | -8 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -44 | -43 | -34 | -25 | -8 | -154.0 | -30.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 11.2
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -72.8
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 | 59% | 60% | 56% | 52% | 49% |
| 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.
Marston Middle math proficiency
Zero+ meets standard.
44% less $meal
48% less $meal
45% less $meal
43% less $meal
41% 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.