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Latest PCED-30-01 Exam Practice Questions

The practice questions for PCED-30-01 exam was last updated on 2025-09-15 .

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Question#1

What does the coefficient of determination (R-squared) represent in regression analysis?

A. The proportion of the variance in the dependent variable explained by the independent variables

B. The confidence level of the regression model

C. The correlation between variables

D. The standard error of the regression

What is the purpose of cross-validation in data analysis and modeling?

A. To train a model on the entire dataset

B. To overfit the model to the training data

C. To validate the model's performance on unseen data

D. To remove outliers from the dataset

When would you use a t-test in statistical analysis?

A. When comparing means of two independent groups

B. When comparing more than two group means

C. When analyzing correlation between variables

D. When analyzing categorical data

What does covariance measure in terms of two variables?

A. Only the strength of the linear relationship

B. The direction of the relationship

C. The shape of the relationship

D. Both the direction and the strength of the linear relationship

Which of the following visualization techniques is commonly used for showing the distribution of a single continuous variable?

A. Histogram

B. Pie Chart

C. Scatter Plot

D. Line Plot

Exam Code: PCED-30-01Q & A: 234 Q&AsUpdated: 2025-09-15