Plaza Vista (Data source)
Source data for Plaza Vista
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 | 1583473 | 2482 | - | 2436 | = | 46 | * | (107 | / | 620) | = | 7.93870967 | ||
| 4 | 1583474 | 2532 | - | 2485 | = | 47 | * | (98 | / | 620) | = | 7.42903225 | ||
| 5 | 1583477 | 2551 | - | 2528 | = | 23 | * | (130 | / | 620) | = | 4.82258064 | ||
| 6 | 1583478 | 2600 | - | 2552 | = | 48 | * | (105 | / | 620) | = | 8.12903222 | ||
| 7 | 1583481 | 2641 | - | 2567 | = | 74 | * | (93 | / | 620) | = | 11.1 | ||
| 8 | 1583482 | 2675 | - | 2586 | = | 89 | * | (87 | / | 620) | = | 12.48870962 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Plaza Vista | 52 | ||||||||||||
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 | 49545 | 2489 | - | 2436 | = | 53 | * | (102 | / | 598) | = | 9.04013373 | ||
| 4 | 49546 | 2539 | - | 2485 | = | 54 | * | (99 | / | 598) | = | 8.93979931 | ||
| 5 | 49549 | 2546 | - | 2528 | = | 18 | * | (98 | / | 598) | = | 2.94983276 | ||
| 6 | 49551 | 2590 | - | 2552 | = | 38 | * | (124 | / | 598) | = | 7.87959864 | ||
| 7 | 49552 | 2648 | - | 2567 | = | 81 | * | (90 | / | 598) | = | 12.19063543 | ||
| 8 | 49555 | 2679 | - | 2586 | = | 93 | * | (85 | / | 598) | = | 13.21906352 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Plaza Vista | 54 | ||||||||||||
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 | 50909 | 2491 | - | 2436 | = | 55 | * | (121 | / | 602) | = | 11.05481724 | ||
| 4 | 50911 | 2534 | - | 2485 | = | 49 | * | (97 | / | 602) | = | 7.89534883 | ||
| 5 | 50912 | 2568 | - | 2528 | = | 40 | * | (98 | / | 602) | = | 6.51162788 | ||
| 6 | 50915 | 2585 | - | 2552 | = | 33 | * | (100 | / | 602) | = | 5.48172755 | ||
| 7 | 50917 | 2636 | - | 2567 | = | 69 | * | (98 | / | 602) | = | 11.23255809 | ||
| 8 | 50919 | 2708 | - | 2586 | = | 122 | * | (88 | / | 602) | = | 17.83388692 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Plaza Vista | 60 | ||||||||||||
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 | 50944 | 2492 | - | 2436 | = | 56 | * | (102 | / | 577) | = | 9.89948002 | ||
| 4 | 50947 | 2535 | - | 2485 | = | 50 | * | (116 | / | 577) | = | 10.05199305 | ||
| 5 | 50948 | 2548 | - | 2528 | = | 20 | * | (96 | / | 577) | = | 3.32755632 | ||
| 6 | 50951 | 2612 | - | 2552 | = | 60 | * | (96 | / | 577) | = | 9.98266896 | ||
| 7 | 50952 | 2620 | - | 2567 | = | 53 | * | (78 | / | 577) | = | 7.16464468 | ||
| 8 | 50955 | 2683 | - | 2586 | = | 97 | * | (89 | / | 577) | = | 14.9618717 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Plaza Vista | 55 | ||||||||||||
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 | 51154 | 2490 | - | 2436 | = | 54 | * | (106 | / | 574) | = | 9.97212541 | ||
| 4 | 51155 | 2539 | - | 2485 | = | 54 | * | (96 | / | 574) | = | 9.03135884 | ||
| 5 | 51156 | 2568 | - | 2528 | = | 40 | * | (114 | / | 574) | = | 7.94425084 | ||
| 6 | 51157 | 2596 | - | 2552 | = | 44 | * | (94 | / | 574) | = | 7.2055749 | ||
| 7 | 51158 | 2657 | - | 2567 | = | 90 | * | (93 | / | 574) | = | 14.58188145 | ||
| 8 | 51159 | 2661 | - | 2586 | = | 75 | * | (71 | / | 574) | = | 9.27700343 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Plaza Vista | 58 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 52 | 54 | 60 | 55 | 58 | 279.0 | 55.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 64.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: 46.8
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 | 12% | 10% | 11% | 18% | 18% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Irvine Unified school district | County of Orange
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.
Plaza Vista math proficiency
Zero+ meets standard.
8% less $meal
6% less $meal
8% less $meal
14% less $meal
14% 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.