Contenido del Curso

Data Analysis with Excel

## Data Analysis with Excel

1. Data Management and Manipulation

2. Basic Data Analysis

3. Data Visualization and Automation

4. Advanced Data Analytics Techniques

# Regression Analysis

In this chapter, we will explore the basics of performing **linear regression analysis** using Microsoft Excel. Linear regression is a fundamental statistical method that allows us to understand the **relationship between two or more variables**.

By the end of this chapter, you'll learn how to use Excel to **model and predict outcomes** based on **historical data**, an essential skill in many fields such as economics, business, and science.

# Task

In this practical exercise, you will **apply the linear regression techniques** learned in this chapter to a real dataset.

NoteUse the dataset from the previous chapter.

The goal is to predict **Monthly Sales** based on the **Advertising Budget** and **Monthly Visitors**.

- Begin by opening your Excel workbook that contains the columns
**Monthly Sales**and**Advertising Budget**among others. - Navigate to the
**Data**tab in Excel and select**Data Analysis**. - From the list of analysis tools, choose
**Regression**and proceed. - In the
**Regression**dialog box, designate**Monthly Sales**as the**Dependent Variable (Y Range)**and**Advertising Budget**and**Monthly Visitors**as the**Independent Variable (X Range)**. - If your selected data includes headers, check the
**Labels**box. Specify where you want the analysis results to appear on your worksheet by selecting the**Output Range**. - Check
**Residuals**to include an error analysis in your output. - Click
**OK**to**run the Regression Analysis**. Review the results, paying particular attention to the**R-squared value**to evaluate the model's fit, and assess the coefficients to gauge the impact of the**Advertising Budget**and the**Monthly Visitors**on**Monthly Sales**. - Utilize the coefficients derived from your regression analysis to
**craft a formula**that predicts sales based on varying advertising budgets. - Experiment with this formula by altering the values of the
**Advertising Budget**and the**Monthly Visitors**to observe the changes in predicted**Monthly Sales**.

¿Todo estuvo claro?