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Latest PCED-30-01 Exam Practice Questions

The practice questions for PCED-30-01 exam was last updated on 2026-02-24 .

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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

Question#2

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

Question#3

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

Question#4

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

Question#5

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

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This page is for educational and exam preparation reference only. It is not affiliated with Python Institute, PCED, or the official exam provider. Candidates should refer to official documentation and training for authoritative information.

Exam Code: PCED-30-01Q & A: 234 Q&AsUpdated: 2026-02-24

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