2022 Introduction to Statistics in Research Mitchell 2nd ed

I N T R O T O R E S E A R C H : D A T A V I S U A L I Z A T I O N & C O M M O N S T A T T E S T S

Table 132: Output for test of homogeneity

The Bartlett test of homogeneity

The Levene test is less sensitive than the Bartlett test and if you still have questions, take the time to run the Bartlett test. There are several Bartlett test online calculators available. But before you go to one, you will need to run descriptive statistics on your data. All of the online calculators require your priori alpha level (0.05), the sample size for each group and the number of groups and the variance for each group. The Stat Trek: Teach yourself statistics website available at https://stattrek.com/online- calculator/bartletts-test.aspx provides several calculators and one of them is the Bartletts test. You just need to add information that you can pull from descriptive statistics.

Table 133: Online Bartletts Homogeneity of Variance Calculator

The Bartlett p-value is .863 and since it is larger than the significance level, we accept the null hypothesis. Equal variance is assumed!

148