In the age of big data, organizations are generating information at unprecedented rates—from customer transactions and sensor readings to social media posts and video content. To make sense of all…
Dataset Overview: Assume we’re working with two tables: 1. Customers customer_idnamecountry1Alice SmithUSA2John LeeCanada3Sara KhanUK 2. Orders order_idcustomer_idorder_dateamount10112024-12-01120.0010222024-12-05150.0010312024-12-09200.00 🧪 PART 1: Basic SELECT Queries Q1. Write a query to get all…
In the world of data analytics, flashy tools like Python, R, or Tableau often grab the spotlight. But behind almost every data-driven decision lies a foundational language that does the…
Whether you’re running A/B tests, analyzing clinical trial results, or evaluating machine learning outputs, p-values and statistical significance are concepts you’ll encounter often. Unfortunately, they’re also widely misunderstood. This guide…
Data analysis is one of the most essential skills in today’s data-driven world. Whether you're a business analyst, researcher, or data enthusiast, drawing the right conclusions from data can drive…