Lang Ranch (Data source)
Source data for Lang Ranch
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 | 3158658 | 2492 | - | 2436 | = | 56 | * | (121 | / | 347) | = | 19.52737752 | ||
| 4 | 3158659 | 2523 | - | 2485 | = | 38 | * | (112 | / | 347) | = | 12.26512966 | ||
| 5 | 3158662 | 2574 | - | 2528 | = | 46 | * | (114 | / | 347) | = | 15.11239191 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Lang Ranch | 47 | ||||||||||||
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 | 97338 | 2478 | - | 2436 | = | 42 | * | (127 | / | 367) | = | 14.53405993 | ||
| 4 | 97341 | 2540 | - | 2485 | = | 55 | * | (130 | / | 367) | = | 19.48228882 | ||
| 5 | 97343 | 2564 | - | 2528 | = | 36 | * | (110 | / | 367) | = | 10.79019072 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Lang Ranch | 45 | ||||||||||||
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 | 100164 | 2476 | - | 2436 | = | 40 | * | (112 | / | 374) | = | 11.9786096 | ||
| 4 | 100165 | 2543 | - | 2485 | = | 58 | * | (128 | / | 374) | = | 19.85026736 | ||
| 5 | 100168 | 2568 | - | 2528 | = | 40 | * | (134 | / | 374) | = | 14.3315508 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Lang Ranch | 46 | ||||||||||||
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 | 100318 | 2501 | - | 2436 | = | 65 | * | (97 | / | 358) | = | 17.6117318 | ||
| 4 | 100321 | 2523 | - | 2485 | = | 38 | * | (129 | / | 358) | = | 13.69273741 | ||
| 5 | 100322 | 2547 | - | 2528 | = | 19 | * | (132 | / | 358) | = | 7.00558658 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Lang Ranch | 38 | ||||||||||||
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 | 100983 | 2493 | - | 2436 | = | 57 | * | (113 | / | 343) | = | 18.77842565 | ||
| 4 | 100984 | 2537 | - | 2485 | = | 52 | * | (103 | / | 343) | = | 15.61516034 | ||
| 5 | 100985 | 2557 | - | 2528 | = | 29 | * | (127 | / | 343) | = | 10.73760931 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Lang Ranch | 45 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 47 | 45 | 46 | 38 | 45 | 221.0 | 44.2 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 53.2
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: 35.2
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 | 6% | 6% | 7% | 9% | 9% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Conejo Valley Unified school district County of Ventura
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.
Lang Ranch math proficiency
Zero+ meets standard.
5% less $meal
5% less $meal
6% less $meal
7% less $meal
8% 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.