Continuous Data, Independent Samples, Data Structure

k groups, n observations per group, N observations total. Group data stored as a categorical independent variable. Outcome stored as a numeric dependent variable. For example, if we have two groups (k = 2) with scores:

Group 1: 1, 2, 3
Group 2: 4, 5, 6

we set up the data file with a variable for GROUP and SCORE. Data, when LISTed, look like this:

REC GROUP SCORE
1    1     1
2    1     2
3    1     3
4    2     4
5    2     5
6    2     6