Driffill Elementary (Data source)
Source data for Driffill 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 | 3118171 | 2372 | - | 2436 | = | -64 | * | (145 | / | 790) | = | -11.74683539 | ||
| 4 | 3118172 | 2402 | - | 2485 | = | -83 | * | (129 | / | 790) | = | -13.55316454 | ||
| 5 | 3118175 | 2437 | - | 2528 | = | -91 | * | (149 | / | 790) | = | -17.16329105 | ||
| 6 | 3118176 | 2442 | - | 2552 | = | -110 | * | (132 | / | 790) | = | -18.37974677 | ||
| 7 | 3118179 | 2455 | - | 2567 | = | -112 | * | (111 | / | 790) | = | -15.73670885 | ||
| 8 | 3118180 | 2425 | - | 2586 | = | -161 | * | (124 | / | 790) | = | -25.27088603 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Driffill Elementary | -102 | ||||||||||||
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 | 96165 | 2385 | - | 2436 | = | -51 | * | (161 | / | 779) | = | -10.54043642 | ||
| 4 | 96166 | 2421 | - | 2485 | = | -64 | * | (139 | / | 779) | = | -11.4197689 | ||
| 5 | 96168 | 2437 | - | 2528 | = | -91 | * | (130 | / | 779) | = | -15.18613606 | ||
| 6 | 96171 | 2421 | - | 2552 | = | -131 | * | (137 | / | 779) | = | -23.03851085 | ||
| 7 | 96173 | 2434 | - | 2567 | = | -133 | * | (113 | / | 779) | = | -19.29268288 | ||
| 8 | 96175 | 2460 | - | 2586 | = | -126 | * | (99 | / | 779) | = | -16.01283688 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Driffill Elementary | -95 | ||||||||||||
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 | 98952 | 2383 | - | 2436 | = | -53 | * | (115 | / | 752) | = | -8.10505314 | ||
| 4 | 98953 | 2415 | - | 2485 | = | -70 | * | (148 | / | 752) | = | -13.7765957 | ||
| 5 | 98955 | 2438 | - | 2528 | = | -90 | * | (137 | / | 752) | = | -16.39627659 | ||
| 6 | 98957 | 2440 | - | 2552 | = | -112 | * | (127 | / | 752) | = | -18.91489354 | ||
| 7 | 98959 | 2451 | - | 2567 | = | -116 | * | (119 | / | 752) | = | -18.35638288 | ||
| 8 | 98962 | 2440 | - | 2586 | = | -146 | * | (106 | / | 752) | = | -20.57978712 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Driffill Elementary | -96 | ||||||||||||
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 | 99107 | 2388 | - | 2436 | = | -48 | * | (106 | / | 764) | = | -6.65968584 | ||
| 4 | 99108 | 2412 | - | 2485 | = | -73 | * | (128 | / | 764) | = | -12.23036649 | ||
| 5 | 99111 | 2446 | - | 2528 | = | -82 | * | (138 | / | 764) | = | -14.8115183 | ||
| 6 | 99112 | 2443 | - | 2552 | = | -109 | * | (135 | / | 764) | = | -19.26047113 | ||
| 7 | 99115 | 2459 | - | 2567 | = | -108 | * | (134 | / | 764) | = | -18.94240836 | ||
| 8 | 99116 | 2453 | - | 2586 | = | -133 | * | (123 | / | 764) | = | -21.41230361 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Driffill Elementary | -93 | ||||||||||||
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 | 99776 | 2396 | - | 2436 | = | -40 | * | (117 | / | 752) | = | -6.22340424 | ||
| 4 | 99777 | 2425 | - | 2485 | = | -60 | * | (114 | / | 752) | = | -9.09574464 | ||
| 5 | 99778 | 2452 | - | 2528 | = | -76 | * | (123 | / | 752) | = | -12.430851 | ||
| 6 | 99779 | 2469 | - | 2552 | = | -83 | * | (133 | / | 752) | = | -14.67952127 | ||
| 7 | 99780 | 2472 | - | 2567 | = | -95 | * | (133 | / | 752) | = | -16.80186169 | ||
| 8 | 99781 | 2467 | - | 2586 | = | -119 | * | (132 | / | 752) | = | -20.88829777 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Driffill Elementary | -80 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -102 | -95 | -96 | -93 | -80 | -466.0 | -93.2 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -69.2
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -117.2
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 | 92% | 91% | 89% | 89% | 76% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Oxnard school district | County of Ventura
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.
Driffill Elementary math proficiency
Zero+ meets standard.
83% less $meal
81% less $meal
81% less $meal
83% less $meal
73% 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.