William B. Bristow Middle (Data source)
Source data for William B. Bristow Middle
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 |
||
| 6 | 189892 | 2521 | - | 2552 | = | -31 | * | (372 | / | 1124) | = | -10.25978647 | ||
| 7 | 189893 | 2537 | - | 2567 | = | -30 | * | (377 | / | 1124) | = | -10.06227756 | ||
| 8 | 189896 | 2540 | - | 2586 | = | -46 | * | (375 | / | 1124) | = | -15.34697508 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for William B. Bristow Middle | -36 | ||||||||||||
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 |
||
| 6 | 5664 | 2559 | - | 2552 | = | 7 | * | (395 | / | 1157) | = | 2.3898012 | ||
| 7 | 5665 | 2550 | - | 2567 | = | -17 | * | (378 | / | 1157) | = | -5.554019 | ||
| 8 | 5667 | 2559 | - | 2586 | = | -27 | * | (384 | / | 1157) | = | -8.9611063 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for William B. Bristow Middle | -12 | ||||||||||||
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 |
||
| 6 | 5797 | 2541 | - | 2552 | = | -11 | * | (361 | / | 1128) | = | -3.52039006 | ||
| 7 | 5799 | 2568 | - | 2567 | = | 1 | * | (402 | / | 1128) | = | 0.35638298 | ||
| 8 | 5801 | 2544 | - | 2586 | = | -42 | * | (365 | / | 1128) | = | -13.59042552 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for William B. Bristow Middle | -17 | ||||||||||||
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 |
||
| 6 | 5793 | 2540 | - | 2552 | = | -12 | * | (373 | / | 1109) | = | -4.03606853 | ||
| 7 | 5796 | 2552 | - | 2567 | = | -15 | * | (365 | / | 1109) | = | -4.93688007 | ||
| 8 | 5797 | 2558 | - | 2586 | = | -28 | * | (371 | / | 1109) | = | -9.36699728 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for William B. Bristow Middle | -18 | ||||||||||||
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 |
||
| 6 | 5855 | 2544 | - | 2552 | = | -8 | * | (370 | / | 1130) | = | -2.61946902 | ||
| 7 | 5856 | 2557 | - | 2567 | = | -10 | * | (384 | / | 1130) | = | -3.39823008 | ||
| 8 | 5857 | 2544 | - | 2586 | = | -42 | * | (376 | / | 1130) | = | -13.9752212 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for William B. Bristow Middle | -20 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -36 | -12 | -17 | -18 | -20 | -103.0 | -20.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 6.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -47.6
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 | 24% | 23% | 21% | 24% | 25% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Brentwood Union Elementary school district | County of Contra Costa
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 B. Bristow Middle math proficiency
Zero+ meets standard.
20% less $meal
18% less $meal
17% less $meal
20% less $meal
21% 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.
Intermediate/Middle Schools (Public) schools in Brentwood Union Elementary (3)
| Adams (J. Douglas) Middle | Edna Hill Middle | William B. Bristow Middle |