Vichy Elementary (Data source)
Source data for Vichy 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 | 1387828 | 2474 | - | 2436 | = | 38 | * | (81 | / | 197) | = | 15.62436546 | ||
| 4 | 1387829 | 2498 | - | 2485 | = | 13 | * | (51 | / | 197) | = | 3.36548222 | ||
| 5 | 1387832 | 2516 | - | 2528 | = | -12 | * | (65 | / | 197) | = | -3.95939086 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Vichy Elementary | 15 | ||||||||||||
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 | 43716 | 2493 | - | 2436 | = | 57 | * | (58 | / | 183) | = | 18.06557373 | ||
| 4 | 43718 | 2509 | - | 2485 | = | 24 | * | (75 | / | 183) | = | 9.83606556 | ||
| 5 | 43721 | 2541 | - | 2528 | = | 13 | * | (50 | / | 183) | = | 3.55191256 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Vichy Elementary | 31 | ||||||||||||
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 | 44792 | 2501 | - | 2436 | = | 65 | * | (55 | / | 189) | = | 18.91534392 | ||
| 4 | 44793 | 2501 | - | 2485 | = | 16 | * | (56 | / | 189) | = | 4.74074074 | ||
| 5 | 44795 | 2539 | - | 2528 | = | 11 | * | (78 | / | 189) | = | 4.53968253 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Vichy Elementary | 28 | ||||||||||||
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 | 44803 | 2489 | - | 2436 | = | 53 | * | (46 | / | 163) | = | 14.95705516 | ||
| 4 | 44804 | 2511 | - | 2485 | = | 26 | * | (59 | / | 163) | = | 9.41104294 | ||
| 5 | 44807 | 2539 | - | 2528 | = | 11 | * | (58 | / | 163) | = | 3.91411042 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Vichy Elementary | 28 | ||||||||||||
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 | 44929 | 2480 | - | 2436 | = | 44 | * | (70 | / | 179) | = | 17.20670389 | ||
| 4 | 44930 | 2515 | - | 2485 | = | 30 | * | (49 | / | 179) | = | 8.21229048 | ||
| 5 | 44931 | 2546 | - | 2528 | = | 18 | * | (60 | / | 179) | = | 6.03351954 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Vichy Elementary | 31 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 15 | 31 | 28 | 28 | 31 | 133.0 | 26.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 44.6
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: 8.6
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 | 13% | 16% | 16% | 21% | 17% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Napa Valley Unified school district | County of Napa
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.
Vichy Elementary math proficiency
Zero+ meets standard.
10% less $meal
12% less $meal
13% less $meal
18% less $meal
16% 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.