An independent t-test is used to test for:
A)Differences between means of groups containing different entities when the data are not normally distributed or have unequal variances.
B)Differences between means of groups containing different entities when the sampling distribution is normal, the groups have equal variances and data are at least interval.
C)Differences between means of groups containing the same entities when the data are normally distributed, have equal variances and data are at least interval.
D)Differences between means of groups containing the same entities when the sampling distribution is not normally distributed and the data do not have unequal variances.

Question

Quizplus · Accepted Answer

An independent t-test is used to test for differences between means of groups containing different entities when the sampling distribution is normal, the groups have equal variances and data are at least interval. This means that the data has a normal distribution, the variances are equal across groups being compared, and the data is measured at an interval or ratio level. If these assumptions are not met, other tests like the Mann-Whitney U test or Welch's t-test may be more appropriate.

An Independent T-Test Is Used to Test For