How to Use the Bartlett's Test Calculator?
 Enter the data values for up to five groups. The input format should be 4,6,8,10 or 4 6 8 10.
 Select the significance level.
 Press the 'Calculate' button to run the Bartlett's test.
 Finally, the tool returns the test statistic (T) and Pvalue corresponding to the test.
 In addition, it also shows whether the Pvalue result is significant or not.
What is Bartlett's Test?
Bartlett's test is used to check if multiple groups (samples) have equal variances, which verifies the assumption in parametric statistical tests like OneWay ANOVA.
If the pvalue is less than 0.05, it suggests that the variances are unequal across the groups.
How to Calculate?
The following formula is used to compute the test statistic (T) for Bartlett's Test:
T = 

× ln(s_{p}^{2})  
Σ 
(n_{i}  1) ln(s_{i}^{2}) 
s_{p}^{2} = 
Σ(n_{i}  1) × s_{i}^{2}   N  k 

Where,
k = Number of groups (samples),
N = Total number of data points,
C = Correction factor,
s_{p}^{2} = Pooled variance,
s_{i}^{2} = Sample variance of the i^{th} group,
n_{i} = Sample size of the i^{th} group.