William Northrup Elementary (Data source)
Source data for William Northrup 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 | 1214893 | 2407 | - | 2436 | = | -29 | * | (89 | / | 482) | = | -5.35477176 | ||
4 | 1214894 | 2479 | - | 2485 | = | -6 | * | (80 | / | 482) | = | -0.99585062 | ||
5 | 1214897 | 2462 | - | 2528 | = | -66 | * | (68 | / | 482) | = | -9.31120331 | ||
6 | 1214898 | 2492 | - | 2552 | = | -60 | * | (69 | / | 482) | = | -8.58921156 | ||
7 | 1214901 | 2558 | - | 2567 | = | -9 | * | (88 | / | 482) | = | -1.64315353 | ||
8 | 1214902 | 2610 | - | 2586 | = | 24 | * | (88 | / | 482) | = | 4.38174274 | ||
Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for William Northrup Elementary | -22 |
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 | 37751 | 2431 | - | 2436 | = | -5 | * | (63 | / | 462) | = | -0.68181818 | ||
4 | 37754 | 2445 | - | 2485 | = | -40 | * | (83 | / | 462) | = | -7.18614716 | ||
5 | 37755 | 2507 | - | 2528 | = | -21 | * | (78 | / | 462) | = | -3.54545453 | ||
6 | 37757 | 2519 | - | 2552 | = | -33 | * | (71 | / | 462) | = | -5.07142855 | ||
7 | 37759 | 2533 | - | 2567 | = | -34 | * | (72 | / | 462) | = | -5.29870127 | ||
8 | 37761 | 2591 | - | 2586 | = | 5 | * | (95 | / | 462) | = | 1.02813853 | ||
Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for William Northrup Elementary | -21 |
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 | 38607 | 2440 | - | 2436 | = | 4 | * | (62 | / | 430) | = | 0.57674418 | ||
4 | 38610 | 2474 | - | 2485 | = | -11 | * | (60 | / | 430) | = | -1.53488371 | ||
5 | 38612 | 2478 | - | 2528 | = | -50 | * | (78 | / | 430) | = | -9.0697674 | ||
6 | 38614 | 2530 | - | 2552 | = | -22 | * | (78 | / | 430) | = | -3.99069766 | ||
7 | 38615 | 2555 | - | 2567 | = | -12 | * | (74 | / | 430) | = | -2.06511628 | ||
8 | 38618 | 2538 | - | 2586 | = | -48 | * | (78 | / | 430) | = | -8.7069767 | ||
Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for William Northrup Elementary | -25 |
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 | 38583 | 2413 | - | 2436 | = | -23 | * | (49 | / | 404) | = | -2.78960394 | ||
4 | 38585 | 2468 | - | 2485 | = | -17 | * | (67 | / | 404) | = | -2.81930693 | ||
5 | 38587 | 2480 | - | 2528 | = | -48 | * | (61 | / | 404) | = | -7.24752475 | ||
6 | 38589 | 2503 | - | 2552 | = | -49 | * | (79 | / | 404) | = | -9.58168315 | ||
7 | 38591 | 2517 | - | 2567 | = | -50 | * | (81 | / | 404) | = | -10.02475245 | ||
8 | 38593 | 2555 | - | 2586 | = | -31 | * | (67 | / | 404) | = | -5.1410891 | ||
Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for William Northrup Elementary | -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 | 38783 | 2421 | - | 2436 | = | -15 | * | (46 | / | 355) | = | -1.94366196 | ||
4 | 38784 | 2471 | - | 2485 | = | -14 | * | (48 | / | 355) | = | -1.89295774 | ||
5 | 38785 | 2471 | - | 2528 | = | -57 | * | (66 | / | 355) | = | -10.59718304 | ||
6 | 38786 | 2512 | - | 2552 | = | -40 | * | (59 | / | 355) | = | -6.64788732 | ||
7 | 38787 | 2526 | - | 2567 | = | -41 | * | (66 | / | 355) | = | -7.62253517 | ||
8 | 38788 | 2563 | - | 2586 | = | -23 | * | (70 | / | 355) | = | -4.53521125 | ||
Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for William Northrup Elementary | -33 |
Last steps
Compute the average
2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
---|---|---|---|---|---|---|
-22 | -21 | -25 | -38 | -33 | -139.0 | -27.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -6.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -48.8
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 | 80% | 81% | 82% | 83% | 78% |
Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Alhambra Unified 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.
William Northrup Elementary math proficiency
Zero+ meets standard.
67% less $meal
67% less $meal
66% less $meal
72% less $meal
67% 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.