Challenger Middle (Data source)
Source data for Challenger 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 | 2276226 | 2570 | - | 2552 | = | 18 | * | (320 | / | 967) | = | 5.9565667 | ||
| 7 | 2276229 | 2586 | - | 2567 | = | 19 | * | (329 | / | 967) | = | 6.46432263 | ||
| 8 | 2276230 | 2596 | - | 2586 | = | 10 | * | (318 | / | 967) | = | 3.28852119 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Challenger Middle | 16 | ||||||||||||
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 | 69786 | 2571 | - | 2552 | = | 19 | * | (337 | / | 966) | = | 6.62836438 | ||
| 7 | 69788 | 2601 | - | 2567 | = | 34 | * | (316 | / | 966) | = | 11.1221532 | ||
| 8 | 69790 | 2620 | - | 2586 | = | 34 | * | (313 | / | 966) | = | 11.01656314 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Challenger Middle | 29 | ||||||||||||
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 | 71618 | 2567 | - | 2552 | = | 15 | * | (310 | / | 941) | = | 4.94155154 | ||
| 7 | 71621 | 2591 | - | 2567 | = | 24 | * | (327 | / | 941) | = | 8.34006374 | ||
| 8 | 71622 | 2625 | - | 2586 | = | 39 | * | (304 | / | 941) | = | 12.59936235 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Challenger Middle | 26 | ||||||||||||
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 | 71763 | 2591 | - | 2552 | = | 39 | * | (323 | / | 937) | = | 13.4439701 | ||
| 7 | 71765 | 2616 | - | 2567 | = | 49 | * | (301 | / | 937) | = | 15.74066166 | ||
| 8 | 71767 | 2628 | - | 2586 | = | 42 | * | (313 | / | 937) | = | 14.02988257 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Challenger Middle | 43 | ||||||||||||
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 | 72249 | 2563 | - | 2552 | = | 11 | * | (310 | / | 924) | = | 3.69047619 | ||
| 7 | 72250 | 2608 | - | 2567 | = | 41 | * | (323 | / | 924) | = | 14.33225106 | ||
| 8 | 72251 | 2637 | - | 2586 | = | 51 | * | (291 | / | 924) | = | 16.06168826 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Challenger Middle | 34 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 16 | 29 | 26 | 43 | 34 | 148.0 | 29.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 56.6
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: 2.6
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 | 44% | 44% | 43% | 42% | 43% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
San Diego Unified school district | County of San Diego
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.
Challenger Middle math proficiency
Zero+ meets standard.
29% less $meal
31% less $meal
30% less $meal
31% less $meal
33% 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.