DA0-002 Data Acquisition and Preparation Practice Question
A data analyst is investigating a correlation between two continuous variables. Which THREE of the following are appropriate steps in this exploratory data analysis? (Select THREE.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Calculate the Pearson correlation coefficient
Scatter plot visualizes relationship, correlation coefficient quantifies strength, and removing outliers may be needed to avoid misleading results.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Calculate the Pearson correlation coefficient
Why this is correct
Quantifies linear correlation.
- ✓
Create a scatter plot
Why this is correct
Visualizes relationship between two continuous variables.
- ✗
Perform a t-test
Why it's wrong here
T-test compares means, not correlation.
- ✓
Check for outliers using box plots
Why this is correct
Outliers can affect correlation; identifying them is important.
- ✗
Create a contingency table
Why it's wrong here
For categorical variables, not continuous.
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