Bella Vista Elementary (Data source)
Source data for Bella Vista Elementary
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 | 1034916 | 2384 | - | 2436 | = | -52 | * | (107 | / | 357) | = | -15.58543412 | ||
| 4 | 1034919 | 2399 | - | 2485 | = | -86 | * | (128 | / | 357) | = | -30.83473386 | ||
| 5 | 1034920 | 2419 | - | 2528 | = | -109 | * | (122 | / | 357) | = | -37.24929965 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Bella Vista Elementary | -84 | ||||||||||||
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 | 32484 | 2410 | - | 2436 | = | -26 | * | (87 | / | 324) | = | -6.98148147 | ||
| 4 | 32487 | 2409 | - | 2485 | = | -76 | * | (105 | / | 324) | = | -24.62962962 | ||
| 5 | 32488 | 2434 | - | 2528 | = | -94 | * | (132 | / | 324) | = | -38.29629626 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Bella Vista Elementary | -70 | ||||||||||||
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 | 33057 | 2419 | - | 2436 | = | -17 | * | (101 | / | 288) | = | -5.96180555 | ||
| 4 | 33059 | 2446 | - | 2485 | = | -39 | * | (80 | / | 288) | = | -10.8333333 | ||
| 5 | 33061 | 2444 | - | 2528 | = | -84 | * | (107 | / | 288) | = | -31.20833327 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Bella Vista Elementary | -48 | ||||||||||||
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 | 33075 | 2428 | - | 2436 | = | -8 | * | (83 | / | 268) | = | -2.47761194 | ||
| 4 | 33077 | 2486 | - | 2485 | = | 1 | * | (100 | / | 268) | = | 0.37313433 | ||
| 5 | 33079 | 2506 | - | 2528 | = | -22 | * | (85 | / | 268) | = | -6.97761194 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Bella Vista Elementary | -9 | ||||||||||||
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 | 33250 | 2422 | - | 2436 | = | -14 | * | (57 | / | 244) | = | -3.2704918 | ||
| 4 | 33251 | 2467 | - | 2485 | = | -18 | * | (82 | / | 244) | = | -6.04918031 | ||
| 5 | 33252 | 2526 | - | 2528 | = | -2 | * | (105 | / | 244) | = | -0.86065574 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Bella Vista Elementary | -10 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -84 | -70 | -48 | -9 | -10 | -221.0 | -44.2 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 57.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -146.2
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 | 83% | 84% | 75% | 73% | 82% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Montebello Unified school district | County of Los Angeles
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.
Bella Vista Elementary math proficiency
Zero+ meets standard.
70% less $meal
70% less $meal
62% less $meal
63% less $meal
71% 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.