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Here’s a short, engaging story you can use as a narrative thread for a based on Gujarati’s Basic Econometrics . It illustrates key concepts like regression, OLS, assumptions, and hypothesis testing. Story Title: The Coffee Shop Mystery Slide 1: Introduction – The Question Scene: A small coffee shop owner, Priya , notices that on warmer days, she sells more iced coffee. But on rainy days, hot coffee sells more. She wants to know: 👉 How much does temperature actually affect iced coffee sales?
Sample data → estimate population relationship. Slide 4: Plot the Data – Scatter Diagram Students see a positive slope. Priya draws a line through the points. basic econometrics gujarati ppt
Scatter plot → visual check for linearity. Slide 5: The OLS Method – Finding the Best Line Priya wants the line that minimizes the sum of squared errors (vertical distances). She uses Ordinary Least Squares (OLS) . Here’s a short, engaging story you can use
Priya feels confident, but knows other factors (humidity, day of week) could help. She predicts sales for 35°C: (20 + 3.5*35 = 142.5) cups. But on rainy days, hot coffee sells more
