Contents
- 1 What does the difference of the means of each group indicate what makes the mean of one group greater or less than the mean of the other group?
- 2 What is the difference between within group and between group?
- 3 How can I compare groups with unequal sample sizes?
- 4 How is the mean of square within a group obtained?
What does the difference of the means of each group indicate what makes the mean of one group greater or less than the mean of the other group?
The mean difference, or difference in means, measures the absolute difference between the mean value in two different groups. In clinical trials, it gives you an idea of how much difference there is between the averages of the experimental group and control groups.
What is the difference between within group and between group?
Between-group differences show how two or more groups are different, whereas within-group differences show differences among subjects who are in the same group. Within-group differences can come to light when looking at a between-group research study.
How can I compare groups with unequal sample sizes?
One group is n=4 and the other is n=68. The n=4 group doesn’t have enough subjects to really test for normality so I’m not sure if a t-test for independent means will work. I’m thinking probably a Mann-Whitney U test. Any suggestions? Is it even possible to compare the means between the two groups with such a difference in size?
Are there unequal sample sizes for mixed ANOVA?
However, all these different groups have different numbers of examinees. The first group has 490 participants, the second group has 1919 participants and the third group has 529 participants. Thus, I can say that I have unequal sample sizes for Mixed ANOVA.
How to compare means between two groups of students?
In the data, the first column is test scores for all students and the second column is the grouping variables. Here, ‘p’ is for student doing psychology and ‘l’ is for law students. Select “Analyze -> Compare Means -> Independent-Samples T Test”.
How is the mean of square within a group obtained?
The mean of square within groups (MSW) is subsequently obtained by dividing SSW with degrees of freedom, in the same way. The ratio of MSB and MSW determines the degree of how relatively greater the difference is between group means (between group variance) compared to within group variance.