1️⃣ Question 1

Role of the Business Understanding stage in guiding data collection:

• ❌ Determines number of data points

• ❌ Determines visualization techniques

• ❌ Ensures data is free of errors

• ✅ Identifies the data sources and variables required to address the business problem

Explanation:
Business Understanding identifies what data is needed by clarifying the business problem.

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2️⃣ Question 2

Primary goal of the business understanding stage (customer churn example):

• ❌ Analyzing historical complaints

• ✅ Understanding the factors contributing to customer churn

• ❌ Identifying most popular plan

• ❌ Competitor market analysis

Explanation:
Business Understanding defines what problem to solve—in this case, why customers churn.

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3️⃣ Question 3

Primary goal of the analytical approach:

• ❌ Gather as much data as possible

• ✅ Iteratively explore and analyze data to find actionable insights

• ❌ Use the most complex algorithms

• ❌ Create dashboards

Explanation:
Analytical approach focuses on exploration, evaluation, and insight discovery, not complexity or visuals.

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4️⃣ Question 4

First step data scientists take for Business Understanding:

• ❌ Identifying objectives supporting the goal

• ❌ Engaging management

• ❌ Engaging stakeholders

• ✅ Understand the goal

Explanation:
Everything begins with clearly understanding the main business goal.

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5️⃣ Question 5

Which analytics is suitable for anticipating customer preferences?

• ❌ Statistical Modeling

• ❌ Descriptive Modeling

• ❌ Classification Modeling

• ✅ Predictive Modeling

Explanation:
Predictive analytics uses historical data to forecast future behavior or preferences.

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🧾 Summary Table