Bell Middle (Data source)
Source data for Bell 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 | 2265316 | 2466 | - | 2552 | = | -86 | * | (285 | / | 855) | = | -28.66666664 | ||
| 7 | 2265317 | 2469 | - | 2567 | = | -98 | * | (275 | / | 855) | = | -31.52046775 | ||
| 8 | 2265320 | 2500 | - | 2586 | = | -86 | * | (295 | / | 855) | = | -29.67251455 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Bell Middle | -90 | ||||||||||||
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 | 69503 | 2459 | - | 2552 | = | -93 | * | (262 | / | 849) | = | -28.69964664 | ||
| 7 | 69505 | 2487 | - | 2567 | = | -80 | * | (297 | / | 849) | = | -27.98586568 | ||
| 8 | 69508 | 2490 | - | 2586 | = | -96 | * | (290 | / | 849) | = | -32.79151939 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Bell Middle | -89 | ||||||||||||
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 | 71336 | 2472 | - | 2552 | = | -80 | * | (233 | / | 755) | = | -24.68874168 | ||
| 7 | 71338 | 2490 | - | 2567 | = | -77 | * | (233 | / | 755) | = | -23.76291387 | ||
| 8 | 71341 | 2450 | - | 2586 | = | -136 | * | (289 | / | 755) | = | -52.05827802 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Bell Middle | -101 | ||||||||||||
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 | 71482 | 2492 | - | 2552 | = | -60 | * | (226 | / | 679) | = | -19.9705449 | ||
| 7 | 71484 | 2500 | - | 2567 | = | -67 | * | (219 | / | 679) | = | -21.60972011 | ||
| 8 | 71486 | 2504 | - | 2586 | = | -82 | * | (234 | / | 679) | = | -28.25920465 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Bell Middle | -70 | ||||||||||||
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 | 71967 | 2468 | - | 2552 | = | -84 | * | (234 | / | 677) | = | -29.03397336 | ||
| 7 | 71968 | 2498 | - | 2567 | = | -69 | * | (228 | / | 677) | = | -23.23781386 | ||
| 8 | 71969 | 2499 | - | 2586 | = | -87 | * | (215 | / | 677) | = | -27.62924668 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Bell Middle | -80 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -90 | -89 | -101 | -70 | -80 | -430.0 | -86.0 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -53.0
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -119.0
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 | 81% | 81% | 82% | 79% | 79% |
| 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.
Bell Middle math proficiency
Zero+ meets standard.
62% less $meal
64% less $meal
66% less $meal
63% less $meal
63% 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.