Monday 28 October 2013

Bartlett's Test Calculator for Equality of Variance

There are statistical tests that involve three or more groups or datasets, and that require the variances of all the groups to be the same, such as the ANOVA test. Bartlett's test can be used to test for equality (more precisely, homogeneity) of variances between groups, and requires that all the data are Gaussian distributed in order to yield a reliable result. For more details on how to carry out Bartlett's test, have a look at the following post.

Simply click on the link directly below to add text boxes. Each text box stores a single group/dataset and needs to be filled in with comma separated numbers. Alternatively, you can choose two file entry methods:-

  1. Select multiple single column CSV files to populate the text boxes by repeatedly pressing the Choose File button - there must be one distinct (and differently named) file for each text box i.e. one file per group. Each file can have a different number of samples.
  2. Select a single multi-column CSV file by pressing the Choose File button once, where the number of columns equals the number of groups - all groups need to have the same number of samples.

There is a graph at the bottom which will display scatter plots for all the groups, once the calculate button is pressed.

Please click to add a dataset group - need at least three

Results pending...

Scatter plot of all the groups
Sample values
Group number


  1. help!! how put in the data if are just one space?

  2. I like viewing web sites which comprehend the price of delivering the excellent useful resource free of charge. I truly adored reading your posting. Thank you! online antiderivative calculator

  3. It's a pleasure for me to write this testimony about this wonderful thing that happened to me last week on how i got my peripheral artery disease (PAD) cured, i have been reading so-many post of some people who were cured of peripheral artery disease (PAD), but i never believed them, I was hurt and depressed so I was too curious and wanted to try dr emu when i contact him, he assured me 100% that he will heal me, i pleaded with him to help me out, it's a great success that he healed just as he promised, he told me that in three days time that i should go and check on my peripheral artery disease (PAD) status, I was floored that when i went to the hospital to check of my status that i was peripheral artery disease (PAD) negative, i never thought possible that dr emu can do miracles, i never really believed in magic but I played along with a little hope and faith and after everything but dr emu changed my life and made me a true believer you can contact him or whatsapp Number: +2347012841542 website: he said that he is also specialize on the following diseases: HERPES, HIV, ALS, HPV, DIABETES, HEPATITIS B, CANCER, SICKLE CELL, VIRGINAL DRYNESS, And Bring Back Your Ex back.


  4. It’s actually a great and helpful piece of information. I
    am happy that you shared this helpful information with us.
    Please stay us informed like this. Thanks for sharing.

    My web site - 오피사이트

  5. This post is so wonderful and creative for all the new upcoming generations but there are also very effective and creative services avaialable like to having the most reliable CIPD Assignment Help from them very easily and deservingly in all over the UK.

  6. Suppose we are interested in comparing the variances of the power output of two 49P2036 - IBM Delta Electronics Power Supply Cages for System X345. We collect data on the power output of each power supply cage and use the Bartlett's test calculator to test for equality of variance.