Nystrom Elementary (Data source)
Source data for Nystrom 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 | 238392 | 2332 | - | 2436 | = | -104 | * | (67 | / | 206) | = | -33.82524267 | ||
4 | 238395 | 2384 | - | 2485 | = | -101 | * | (55 | / | 206) | = | -26.96601939 | ||
5 | 238396 | 2394 | - | 2528 | = | -134 | * | (44 | / | 206) | = | -28.62135922 | ||
6 | 238399 | 2419 | - | 2552 | = | -133 | * | (40 | / | 206) | = | -25.82524268 | ||
Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Nystrom Elementary | -115 |
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 | 6987 | 2333 | - | 2436 | = | -103 | * | (73 | / | 241) | = | -31.19917009 | ||
4 | 6990 | 2398 | - | 2485 | = | -87 | * | (65 | / | 241) | = | -23.46473024 | ||
5 | 6991 | 2400 | - | 2528 | = | -128 | * | (51 | / | 241) | = | -27.0871369 | ||
6 | 6994 | 2410 | - | 2552 | = | -142 | * | (52 | / | 241) | = | -30.63900403 | ||
Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Nystrom Elementary | -112 |
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 | 7200 | 2358 | - | 2436 | = | -78 | * | (69 | / | 250) | = | -21.528 | ||
4 | 7202 | 2400 | - | 2485 | = | -85 | * | (66 | / | 250) | = | -22.44 | ||
5 | 7203 | 2400 | - | 2528 | = | -128 | * | (67 | / | 250) | = | -34.304 | ||
6 | 7206 | 2428 | - | 2552 | = | -124 | * | (48 | / | 250) | = | -23.808 | ||
Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Nystrom Elementary | -102 |
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 | 7217 | 2349 | - | 2436 | = | -87 | * | (80 | / | 269) | = | -25.8736059 | ||
4 | 7219 | 2413 | - | 2485 | = | -72 | * | (64 | / | 269) | = | -17.13011148 | ||
5 | 7221 | 2422 | - | 2528 | = | -106 | * | (63 | / | 269) | = | -24.82527876 | ||
6 | 7223 | 2440 | - | 2552 | = | -112 | * | (62 | / | 269) | = | -25.81412635 | ||
Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Nystrom Elementary | -94 |
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 | 7266 | 2368 | - | 2436 | = | -68 | * | (64 | / | 279) | = | -15.59856631 | ||
4 | 7267 | 2414 | - | 2485 | = | -71 | * | (86 | / | 279) | = | -21.88530462 | ||
5 | 7268 | 2452 | - | 2528 | = | -76 | * | (65 | / | 279) | = | -17.70609316 | ||
6 | 7269 | 2438 | - | 2552 | = | -114 | * | (64 | / | 279) | = | -26.15053763 | ||
Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Nystrom Elementary | -81 |
Last steps
Compute the average
2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
---|---|---|---|---|---|---|
-115 | -112 | -102 | -94 | -81 | -504.0 | -100.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -61.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -139.8
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 | 88% | 91% | 96% | 90% | 93% |
Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
West Contra Costa Unified 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.
Nystrom Elementary math proficiency
Zero+ meets standard.
82% less $meal
83% less $meal
89% less $meal
85% less $meal
87% 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.