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 |
| 7 |
97095 |
2551 |
- |
2567 |
= |
-16 |
* |
(374 |
/ |
374)
|
= |
-16.0 |
| Step 4 |
SUM Weighted Distance From Standard to get
2017 Difference From Standard for Ridgeview Middle
|
-16 |
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 |
| 7 |
97261 |
2534 |
- |
2567 |
= |
-33 |
* |
(377 |
/ |
766)
|
= |
-16.24151433 |
| 8 |
97263 |
2598 |
- |
2586 |
= |
12 |
* |
(389 |
/ |
766)
|
= |
6.09399478 |
| Step 4 |
SUM Weighted Distance From Standard to get
2018 Difference From Standard for Ridgeview Middle
|
-10 |
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 |
| 7 |
97923 |
2528 |
- |
2567 |
= |
-39 |
* |
(346 |
/ |
724)
|
= |
-18.63812153 |
| 8 |
97924 |
2588 |
- |
2586 |
= |
2 |
* |
(378 |
/ |
724)
|
= |
1.04419889 |
| Step 4 |
SUM Weighted Distance From Standard to get
2019 Difference From Standard for Ridgeview Middle
|
-18 |
Last steps
Compute the average
| 2017 |
2018 |
2019 |
Sum |
Average |
|
-16
|
-10
|
-18
|
-44.0 |
-14.7 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -2.666666666666666667
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -26.666666666666666667
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:
