What is the primary purpose of the "confounder" variable in statistical analysis?
A. A variable that can affect both the dependent variable and independent variable, leading to a potential spurious relationship
B. A variable that is constant for all data points
C. A variable that is unrelated to the analysis
D. A variable that is used for visualization only
Answer: Option A
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A. Chi-squared test
B. T-test
C. ANOVA
D. Regression analysis
In the context of data ethics, what does "bias mitigation" refer to?
A. Increasing the sample size
B. Improving model accuracy
C. Removing outliers from a dataset
D. Reducing biases in data collection
What does the term "overfitting" mean in machine learning?
A. The model fits the training data too closely and performs poorly on new data
B. The model generalizes well to new data
C. The model is too simple and underperforms on the training data
D. The model is perfectly accurate on all data
In the CRISP-DM data mining process model, what does "DM" stand for?
A. Data Modeling
B. Data Mining
C. Data Manipulation
D. None of the above
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