Libby Elementary (Data source)
Source data for Libby 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 | 2329980 | 2391 | - | 2436 | = | -45 | * | (101 | / | 292) | = | -15.56506845 | ||
| 4 | 2329981 | 2440 | - | 2485 | = | -45 | * | (89 | / | 292) | = | -13.7157534 | ||
| 5 | 2329984 | 2457 | - | 2528 | = | -71 | * | (102 | / | 292) | = | -24.80136983 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Libby Elementary | -54 | ||||||||||||
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 | 71247 | 2388 | - | 2436 | = | -48 | * | (86 | / | 269) | = | -15.3457249 | ||
| 4 | 71250 | 2440 | - | 2485 | = | -45 | * | (98 | / | 269) | = | -16.39405202 | ||
| 5 | 71252 | 2495 | - | 2528 | = | -33 | * | (85 | / | 269) | = | -10.42750929 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Libby Elementary | -42 | ||||||||||||
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 | 73122 | 2392 | - | 2436 | = | -44 | * | (91 | / | 277) | = | -14.45487362 | ||
| 4 | 73124 | 2421 | - | 2485 | = | -64 | * | (88 | / | 277) | = | -20.33212992 | ||
| 5 | 73127 | 2482 | - | 2528 | = | -46 | * | (98 | / | 277) | = | -16.2743682 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Libby Elementary | -51 | ||||||||||||
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 | 73260 | 2396 | - | 2436 | = | -40 | * | (85 | / | 261) | = | -13.02681992 | ||
| 4 | 73262 | 2445 | - | 2485 | = | -40 | * | (86 | / | 261) | = | -13.1800766 | ||
| 5 | 73264 | 2451 | - | 2528 | = | -77 | * | (90 | / | 261) | = | -26.55172412 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Libby Elementary | -53 | ||||||||||||
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 | 73719 | 2431 | - | 2436 | = | -5 | * | (74 | / | 238) | = | -1.55462185 | ||
| 4 | 73720 | 2456 | - | 2485 | = | -29 | * | (82 | / | 238) | = | -9.99159664 | ||
| 5 | 73721 | 2468 | - | 2528 | = | -60 | * | (82 | / | 238) | = | -20.6722689 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Libby Elementary | -32 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -54 | -42 | -51 | -53 | -32 | -232.0 | -46.4 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -19.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -73.4
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 | 96% | 90% | 93% | 93% | 85% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Oceanside Unified school district | County of San Diego
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.
Libby Elementary math proficiency
Zero+ meets standard.
80% less $meal
77% less $meal
73% less $meal
77% less $meal
75% 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.