# Two Samples Test for Discrete Variable and Different Size Groups?

Hello there and apologies for my English and lack of statistic skills!

Two different groups of participants, one comprised of children and the other of adults, run once, at different times, the same test with results in the range of 0 to 60 (i.e. discrete values). The number of participants in each group is different but both are larger than 30. The test is a test of Computational Thinking abilities (think IQ), so I think we can safely assume that the distribution is normal.

I have the Min, Max, Avg, and Std Deviation of the results for both groups. I want to know whether adults do significantly better than kids (my bet is on the kids, though :) ).

I THINK I should use the two samples t-test EXCEPT that this source here states that the test is for continuous data (even though the example it describes is for discrete test scores!)

So, should I use the two samples t-test or should I use another one, and if so - which?

Help!!! :)

• What is the null hypothesis that you want to test: that children and adults score the same on the computational thinking abilities test? Commented Apr 27, 2022 at 8:38
• Yes, this is what I want to (dis)prove.
– Avi
Commented Apr 27, 2022 at 9:40
• Null hypotheses are known to be uninteresting but this one seems particularly unreasonable. I cannot wrap my head around why you want to check if children and adults have the same capacity to reason. How old are the children? Commented Apr 27, 2022 at 10:07
• There is a global international educational competition in Computational Thinking. I'm software eng. and I found it very hard. So if children do better in this competition while adults fail, this indicates the competition can't be used as a measurement tool.
– Avi
Commented Apr 27, 2022 at 12:45
• And if grown-ups do better than children, then I myself am dumb which, to me, is VERY interesting :)
– Avi
Commented Apr 27, 2022 at 12:47