# Coursera machine learning week 3 Quiz answer Regularization | Andrew NG￼

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### Coursera machine learning week 3 Quiz answer Regularization | Andrew Ng

1. You are training a classification model with logistic regression. Which of the following statements are true? Check all that apply.

•  Introducing regularization to the model always results in equal or better performance on the training set.
•  Introducing regularization to the model always results in equal or better performance on examples not in the training set.
•  Adding a new feature to the model always results in equal or better performance on the training set.
•  Adding many new features to the model helps prevent overfitting on the training set.

2. Suppose you ran logistic regression twice, once with $inline&space;lambda&space;=&space;0$, and once with $inline&space;lambda&space;=&space;1$. One of the times, you got parameters $inline&space;theta&space;=&space;begin{bmatrix}&space;74.81\&space;45.05&space;end{bmatrix}$, and the other time you got $inline&space;theta&space;=&space;begin{bmatrix}&space;1.37\&space;0.51&space;end{bmatrix}$. However, you forgot which value of $inline&space;lambda$ corresponds to which value of $inline&space;theta$. Which one do you think corresponds to $inline&space;lambda&space;=&space;1$?

2. Suppose you ran logistic regression twice, once with $inline&space;lambda&space;=&space;0$, and once with $inline&space;lambda&space;=&space;1$. One of the times, you got parameters $inline&space;theta&space;=&space;begin{bmatrix}&space;81.47\&space;12.69&space;end{bmatrix}$, and the other time you got $inline&space;theta&space;=&space;begin{bmatrix}&space;13.01\&space;0.91&space;end{bmatrix}$. However, you forgot which value of $inline&space;lambda$ corresponds to which value of $inline&space;theta$. Which one do you think corresponds to $inline&space;lambda&space;=&space;1$?

3. Which of the following statements about regularization are true? Check all that apply.

3. Which of the following statements about regularization are true? Check all that apply.

4. In which one of the following figures do you think the hypothesis has overfit the training set?

•  Figure:
•  Figure:
•  Figure:
•  Figure:

5. In which one of the following figures do you think the hypothesis has underfit the training set?

•  Figure:
•  Figure:
•  Figure:
•  Figure:

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### FAQs

Is Andrew Ng’s Machine Learning course good?
It is the Best Course for Supervised Machine Learning! Andrew Ng Sir has been like always has such important & difficult concepts of Supervised ML with such ease and great examples, Just amazing!
How do I get answers to coursera assignment?
Use “Ctrl+F” To Find Any Questions Answered. & For Mobile Users, You Just Need To Click On Three dots In Your Browser & You Will Get A “Find” Option There. Use These Options to Get Any Random Questions Answer.
How long does it take to finish coursera Machine Learning?
this specialization requires approximately 3 months with 75 hours of materials to complete, and I finished it in 3 weeks and spent an additional 1 week reviewing the whole course.
How do you submit assignments on Coursera Machine Learning?
Submit a programming assignment Open the assignment page for the assignment you want to submit. Read the assignment instructions and download any starter files. Finish the coding tasks in your local coding environment. Check the starter files and instructions when you need to. Reference