I have a general question about a confidence interval result Igot. The basic form of the prpblem was to compare the exam resultsof students who complete their assignments with those who do not.Cutting to the end, I got t test statistic to be 1.9135 and thectirical value 1.746 with an upper tailed test, so the conclusionwas to reject null hypothesis (null = means are the same for bothgroups of students, alternative was mean of those who completeassignments is higher). So far so good, but then moving on toconfidence interval of 95pct, I got the following interval:
(-1.5756, 30.7756)
and my question is:
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