can normality be used in an unpaired t-test is an unpaired t test valid if the mean difference is normal? what is normality assumption for unpaired data set what is the normality assumption for an unpaired t test what is the norms in paired t test how does a paired t test work how does it become necessary for paired data to be compared at an unpaired test what is the general rule r used for an paired test? what is the requirement of a paired test what is meant by normality in paired t test which condition is not a requirement for a paired t-test? what assumptions are required for an unpaired t test? which assumption is not needed for an unpaired t test? can we test paired t-test and unpaired t-test what is normality assumption how does unpaired t work normality assumptions t test what is normality paired t test used for what should i be looking for in a paired test difference of mean t