Should the degrees of freedom change in the example below (from 54 to 27)? I expected that the group_by would still report df = 27 regardless, as reported in the subset dataset. Please also note the differences in the test statistic in the two examples.
Dear Kassambara,
Should the degrees of freedom change in the example below (from 54 to 27)? I expected that the group_by would still report df = 27 regardless, as reported in the subset dataset. Please also note the differences in the test statistic in the two examples.
Am I missing something?
Thank you.