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 |
11 |
863334 |
2586 |
- |
2628 |
= |
-42 |
* |
(430 |
/ |
430)
|
= |
-42.0 |
Step 4 |
SUM Weighted Distance From Standard to get
2015 Difference From Standard for John Marshall Senior High
|
-42 |
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 |
11 |
27313 |
2575 |
- |
2628 |
= |
-53 |
* |
(510 |
/ |
510)
|
= |
-53.0 |
Step 4 |
SUM Weighted Distance From Standard to get
2016 Difference From Standard for John Marshall Senior High
|
-53 |
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 |
11 |
27889 |
2563 |
- |
2628 |
= |
-65 |
* |
(506 |
/ |
506)
|
= |
-65.0 |
Step 4 |
SUM Weighted Distance From Standard to get
2017 Difference From Standard for John Marshall Senior High
|
-65 |
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 |
11 |
27939 |
2583 |
- |
2628 |
= |
-45 |
* |
(526 |
/ |
526)
|
= |
-45.0 |
Step 4 |
SUM Weighted Distance From Standard to get
2018 Difference From Standard for John Marshall Senior High
|
-45 |
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 |
11 |
28118 |
2599 |
- |
2628 |
= |
-29 |
* |
(510 |
/ |
510)
|
= |
-29.0 |
Step 4 |
SUM Weighted Distance From Standard to get
2019 Difference From Standard for John Marshall Senior High
|
-29 |
Last steps
Compute the average
2015 |
2016 |
2017 |
2018 |
2019 |
Sum |
Average |
-42
|
-53
|
-65
|
-45
|
-29
|
-234.0 |
-46.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -7.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -85.8
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: