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| Vendor: | Databricks |
|---|---|
| Exam Code: | Databricks-Certified-Professional-Data-Scientist |
| Exam Name: | Databricks Certified Professional Data Scientist Exam |
| Exam Questions: | 138 |
| Last Updated: | August 20, 2026 |
| Related Certifications: | |
| Exam Tags: |
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Which method is used to solve for coefficients bO, b1, ... bn in your linear regression model:

In the linear model, the bi's represent the unknown p parameters. The estimates for these unknown parameters are chosen so that, on average, the model provides a reasonable estimate of a person's income based on age and education. In other words, the fitted model should minimize the overall error between the linear model and the actual observations. Ordinary Least Squares (OLS) is a common technique to estimate the parameters
Select the correct statement which applies to Principal component analysis (PCA)
You have modeled the datasets with 5 independent variables called A,B,C,D and E having relationships which is not dependent each other, and also the variable A,B and C are continuous and variable D and E are discrete (mixed mode).
Now you have to compute the expected value of the variable let say A, then which of the following computation you will prefer
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