Statistics in Plain English, Third Edition by Timothy C. Urdan

Author:Timothy C. Urdan [Urdan, Timothy C.]
Language: eng
Format: epub
Tags: Behavioral Sciences
Publisher: Routledge
Published: 2013-11-02T21:00:00+00:00

Writing It Up

Writing up t test results for publication is generally similar for independent, dependent, and single-sample t tests. Usually, what gets reported are the means for the groups being compared, the t value, and the degrees of freedom (df). The write-up for the results of the paired t test described above in Figure 9.3 would be as follows: “A paired t test was calculated to compare the grade point average (GPAs) of students when they were in 5th grade and a year later when they were in 6th grade. The analysis produced a significant t value (t(688) = 8.19, p < .001). An examination of the means revealed that students had higher GPAs in 5th grade (M = 8.08) than they did in 6th grade (M = 7.35).” The write-up for the independent t test summarized in Table 9.4 would be very similar: “I performed an independent t test to compare the grade point averages (GPAs) of 6th grade boys and girls. The analysis produced a significant t value (t(708) = –7.45, p < .001). An examination of the means revealed that boys had lower GPAs (M = 6.58) than did girls (M = 8.14).”

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