Databricks Certified Professional Data Scientist Exam
Last Update Nov 28, 2023
Total Questions : 138
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In which phase of the analytic lifecycle would you expect to spend most of the project time?
In the data preparation phase of the Data Analytics Lifecycle, the data range and distribution can be obtained. If the data is skewed, viewing the logarithm of the data (if it's all positive) can help detect structures that might otherwise be overlooked in a graph with a regular, nonlogarithmic scale.
When preparing the data, one should look for signs of dirty data, as explained in the
previous section. Examining if the data is unimodal or multimodal will give an idea of how many distinct populations with different behavior patterns might be mixed into the overall population. Many modeling techniques assume that the data follows a
normal distribution. Therefore, it is important to know if the available dataset can match that assumption before applying any of those modeling techniques.
Classification and regression are examples of___________.
In classification, our job is to predict what class an instance of data should fall into. Another task in machine learning is regression. Regression is the prediction of a numeric value. Most people have probably seen an example of regression with a best-fit line drawn through some data points to generalize the data points. Classification and regression are examples of supervised learning. This set of problems is known as supervised because we're telling the algorithm what to predict.
If E1 and E2 are two events, how do you represent the conditional probability given that E2 occurs given that E1 has occurred?