arc/notes
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

vault backup: 2023-12-13 14:13:19

Browse Source
This commit is contained in:
zleyyij 2023-12-13 14:13:19 -07:00
parent 572b67c845
commit 6c04ca65b0
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
education/statistics/Correlation and Regression.md
View File

@ -8,13 +8,13 @@ If a scatter diagram is football shaped, it can be summarized using the 5-number
| Variable | Description | | Variable | Description |
| -- | -- | | -- | -- |
| $ave_x$ | | | $ave_x$ | The average of the set graphed along the X axis |
| $SD_x$| | | $SD_x$| The standard deviation of set graphed along the X axis |
| $ave_y$ | | $ave_y$ | The average of the set graphed along the Y axis |
| $SD_y$ | | | $SD_y$ | The standard deviation of the set graphed along the Y axis |
| $r$ | | | $r$ | The correlation coefficient, or how closely clustered the datapoints are in a line|
The intersection of the averages of x and y will be the center of an oval shaped scatter diagram. Draw lines 2SDs from the center along each axis to generalize the shape of a scatter plot
### Association ### Association
- Positive association is demonstrated when the dots are trend upward as $x$ increases ($r$ is positive). - Positive association is demonstrated when the dots are trend upward as $x$ increases ($r$ is positive).