Sierra Elementary (Data source)
Source data for Sierra 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 | 743073 | 2349 | - | 2436 | = | -87 | * | (105 | / | 304) | = | -30.04934203 | ||
| 4 | 743074 | 2389 | - | 2485 | = | -96 | * | (98 | / | 304) | = | -30.94736842 | ||
| 5 | 743077 | 2415 | - | 2528 | = | -113 | * | (101 | / | 304) | = | -37.54276315 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Sierra Elementary | -99 | ||||||||||||
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 | 23378 | 2347 | - | 2436 | = | -89 | * | (108 | / | 297) | = | -32.36363631 | ||
| 4 | 23381 | 2389 | - | 2485 | = | -96 | * | (97 | / | 297) | = | -31.3535353 | ||
| 5 | 23383 | 2404 | - | 2528 | = | -124 | * | (92 | / | 297) | = | -38.41077432 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Sierra Elementary | -102 | ||||||||||||
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 | 23835 | 2367 | - | 2436 | = | -69 | * | (102 | / | 280) | = | -25.13571427 | ||
| 4 | 23837 | 2396 | - | 2485 | = | -89 | * | (80 | / | 280) | = | -25.42857137 | ||
| 5 | 23839 | 2409 | - | 2528 | = | -119 | * | (98 | / | 280) | = | -41.65 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Sierra Elementary | -92 | ||||||||||||
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 | 23855 | 2353 | - | 2436 | = | -83 | * | (95 | / | 277) | = | -28.4657039 | ||
| 4 | 23856 | 2390 | - | 2485 | = | -95 | * | (101 | / | 277) | = | -34.63898911 | ||
| 5 | 23859 | 2397 | - | 2528 | = | -131 | * | (81 | / | 277) | = | -38.30685913 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Sierra Elementary | -101 | ||||||||||||
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 | 24030 | 2344 | - | 2436 | = | -92 | * | (125 | / | 301) | = | -38.20598006 | ||
| 4 | 24031 | 2427 | - | 2485 | = | -58 | * | (83 | / | 301) | = | -15.99335546 | ||
| 5 | 24032 | 2414 | - | 2528 | = | -114 | * | (93 | / | 301) | = | -35.22259129 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Sierra Elementary | -89 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -99 | -102 | -92 | -101 | -89 | -483.0 | -96.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -81.6
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -111.6
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 | 88% | 89% | 89% | 91% | 91% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Lancaster Elementary 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.
Sierra Elementary math proficiency
Zero+ meets standard.
84% less $meal
85% less $meal
83% less $meal
86% less $meal
83% 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.