×

Data Analysis

📌 Important Notice & Guidelines

  • Scholarship Rule: The percentage of marks you score in the test will be equal to the percentage of scholarship you receive.
  • Weekly Test: Tests will be conducted every Friday.
  • Result Update: Your marks/results will be updated on the WhatsApp Channel every Saturday.
  • New Batches: New batches will start every Monday.

1. Data Collection

Data Collection is the step where raw information is gathered from different sources for analysis. Sources can include surveys, online forms, databases, APIs, and web scraping. Beginners learn step-by-step how to collect accurate and high-quality data.

Customer Feedback: [5, 4, 3, 5, 4]

Average rating = (5+4+3+5+4)/5 = 4.2 → Customer satisfaction is high.

2. Data Cleaning

Data Cleaning prepares data for analysis by removing errors, duplicates, and handling missing values.

Customer ages: [25, 30, '', 27, 25]
Step 1: Remove duplicates → [25, 30, '', 27]
Step 2: Fill missing ('') with average → [25, 30, 27.33, 27]

Cleaned ages = [25, 30, 27.33, 27]

3. Data Types

Understanding data types is crucial for analysis. Data can be numerical, categorical, ordinal, or boolean.

Age = 25 (numerical)
Gender = 'Male' (categorical)
Rating = 5 (ordinal)
Subscribed = True (boolean)

Type identification successful.

4. Descriptive Statistics

Descriptive stats summarize data using measures like mean, median, mode, and standard deviation.

Sales = [200, 250, 300, 400, 350]

Mean = 300, Median = 300, Mode = None

5. Data Visualization

Visualization uses charts and graphs to show data patterns and trends clearly.

Monthly Sales: Jan=100, Feb=150, Mar=200

Bar chart shows sales increasing.

6. Using Excel

Excel helps in data analysis using sorting, filtering, formulas, and charts.

Sales = [200, 250, 300]

SUM = 750

7. SQL Basics

SQL fetches data from databases using queries.

SELECT * FROM sales WHERE month='Jan';

January sales rows fetched.

8. Data Interpretation

Interpreting data means finding patterns and drawing conclusions.

Product B sales = 500, Product A sales = 400

Product B performs better.

9. Key Metrics & KPIs

Metrics and KPIs measure business performance.

Revenue = 1000 - 400

Revenue = 600

10. Reporting

Reporting presents results in tables, charts, or dashboards.

Excel bar chart of monthly sales

Sales trend shown increasing.

11. Data Patterns & Trends

Identifying patterns and trends helps in forecasting.

Sales increase every December

Trend identified.

12. Data-driven Decision Making

Decisions are taken based on data insights for better outcomes.

Increase marketing budget for top-selling product

Higher sales expected.

13. Dashboards

Dashboards visually track KPIs and metrics for quick insights.

Tableau dashboard with Sales & Profit

Performance clearly visible.

14. Predictive Analysis

Predictive analysis estimates future sales or trends.

Next month sales forecast = 300

Predicted sales = 300

15. Data Documentation

Documentation keeps analysis steps clear and repeatable.

Maintain a data dictionary

Process becomes transparent and easy to repeat.

Best of Luck to All Students!

Give your best in the test, stay focused, and keep learning something new every day. Believe in yourself, and let each lesson make you stronger and smarter.

WhatsApp Chat