One-way ANOVA (analysis of variance) in Microsoft Excel

Statistical analysis data Of one-way ANOVA in Microsoft Excel :

This example teaches you how to perform a single factor ANOVA (analysis of variance) in Excel. A single factor or one-way ANOVA is used to test the null hypothesis that the means of several populations are all equal.
Below you can find the salaries of people who have a degree in economics, medicine or history.
H₀: μ₁ = μ₂ = μ₃
H₁: at least one of the means is different.

To perform a single factor ANOVA, execute the following steps.
1. On the Data tab, click Data Analysis.

The Analysis ToolPak is an Excel add-in program that provides data analysis tools for financial, statistical and engineering data analysis.
To load the Analysis ToolPak add-in, execute the following steps in the video :

Add analysis ToolPak to Excel

2. Select Anova: Single Factor and click OK.

3. Click in the Input Range box and select the range A2:C10.
4. Click in the Output Range box and select cell E1.

5. Click OK.
Result:

Conclusion: if F > F crit, we reject the null hypothesis. This is the case, 15.196 > 3.443. Therefore, we reject the null hypothesis. The means of the three populations are not all equal. At least one of the means is different. However, the ANOVA does not tell you where the difference lies. You need a t-Test to test each pair of means.
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