Discovery Bay Elementary (Data source)
Source data for Discovery Bay 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 | 192426 | 2450 | - | 2436 | = | 14 | * | (105 | / | 262) | = | 5.61068701 | ||
4 | 192429 | 2486 | - | 2485 | = | 1 | * | (74 | / | 262) | = | 0.28244275 | ||
5 | 192430 | 2536 | - | 2528 | = | 8 | * | (83 | / | 262) | = | 2.53435114 | ||
Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Discovery Bay Elementary | 8 |
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 | 5726 | 2452 | - | 2436 | = | 16 | * | (91 | / | 281) | = | 5.18149466 | ||
4 | 5728 | 2490 | - | 2485 | = | 5 | * | (109 | / | 281) | = | 1.93950178 | ||
5 | 5729 | 2523 | - | 2528 | = | -5 | * | (81 | / | 281) | = | -1.44128114 | ||
Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Discovery Bay Elementary | 6 |
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 | 5859 | 2472 | - | 2436 | = | 36 | * | (72 | / | 264) | = | 9.81818179 | ||
4 | 5861 | 2479 | - | 2485 | = | -6 | * | (92 | / | 264) | = | -2.09090909 | ||
5 | 5863 | 2500 | - | 2528 | = | -28 | * | (100 | / | 264) | = | -10.60606058 | ||
Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Discovery Bay Elementary | -3 |
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 | 5855 | 2469 | - | 2436 | = | 33 | * | (72 | / | 246) | = | 9.65853656 | ||
4 | 5857 | 2511 | - | 2485 | = | 26 | * | (72 | / | 246) | = | 7.60975608 | ||
5 | 5859 | 2497 | - | 2528 | = | -31 | * | (102 | / | 246) | = | -12.85365853 | ||
Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Discovery Bay Elementary | 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 |
||
3 | 5917 | 2503 | - | 2436 | = | 67 | * | (68 | / | 217) | = | 20.99539169 | ||
4 | 5918 | 2498 | - | 2485 | = | 13 | * | (68 | / | 217) | = | 4.07373272 | ||
5 | 5919 | 2522 | - | 2528 | = | -6 | * | (81 | / | 217) | = | -2.23963133 | ||
Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Discovery Bay Elementary | 23 |
Last steps
Compute the average
2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
---|---|---|---|---|---|---|
8 | 6 | -3 | 4 | 23 | 38.0 | 7.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 34.6
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -19.4
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 | 37% | 37% | 38% | 41% | 39% |
Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Byron Union Elementary school district County of Contra Costa
THIS chart shows what the school system "wants"
PLUS a "special" or "outside" cause of variation, parent education.
NOT what teachers want.
NOT what principals want.
NOT what parents want.
Discovery Bay Elementary math proficiency
Zero+ meets standard.
32% less $meal
33% less $meal
28% less $meal
37% less $meal
35% 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.
Elementary School (Public) schools in Byron Union Elementary (2)
Discovery Bay Elementary | Timber Point Elementary |