finish! #91
Open
finish! #91
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
lizarova777
reviewed
Nov 20, 2019
|
|
||
|
|
||
| ``` | ||
| We can see that based on the model we've generated from the old data, the degree of accuracy predicting the new data is only 58%. I don't think this is a very accurate prediction. |
There was a problem hiding this comment.
Try to be more specific, as in, state whether the model is generalizable or does it overfit.
|
|
||
| ``` | ||
| ## Part III | ||
| Compare the predicted advice with the actual advice that these students recieved. What is the difference between the observed and predicted results? | ||
|
|
||
| ```{r} | ||
| # all the students in the new dataset achieved a score of 1.0, therefore, the accuracy of our model's prediction would be: | ||
| mean(ifelse(D2$prediction == "no action", 1, 0)) |
There was a problem hiding this comment.
Another way to calculate the accuracy of the model's prediction is to create a table or a confusion matrix.
| ``` | ||
|
|
||
| Please interpret the tree, which two behaviors do you think the teacher should most closely pay attemtion to? | ||
|
|
||
| Interpret from this plot, the students who are asking for hints for less than 12 times and have less than 63% questions answered correctly before this session are very likely to need intervention (node7). Other than that, students who do not ask for any hints, while have answered less than 85 questions correctly are also quite likely need interventions(node 3). Therefore, I think "students that ask for less than 12 hints" and "have answered less than 85 questions correctly" are the two most important behaviors that teachers should pay close attention to. |
|
|
||
| ``` | ||
| We can see that based on the model we've generated from the old data, the degree of accuracy predicting the new data is only 58%. I don't think this is a very accurate prediction. | ||
|
|
There was a problem hiding this comment.
Overall, great job. Keep up the good work!
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
No description provided.