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Which of the following are true about PCA?

The elbow method can always provide the optimal K value for K means clustering?

You are using gradient descent to minimize the cost function:

Which type of averaging is better when dealing with imbalanced datasets?

For the following data, if you fit a linear regression model, what would be the intercept value?X = [1, 2, 3], y = [2, 4, 6]

What is the purpose of a validation set?

People are most motivated in striving for goals when the goal setting process includes three key features. Which of the following is not one of them?

What does Waitzkin say about loss and failure in the learning process?

___________________ occurs when a divergence of interests or beliefs among people is used to strengthen relationships or facilitate learning or creativity.

How does Waitzkin recommend dealing with distractions during high-stakes performance?