t-Test Application and Interpretation

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One-Sample Statistics Table 1
N Mean Std.Deviation Std. Error Mean
gpa 105 2.7789 0.7638 0.07454
gender 105 1.39 0.49 0.048
Table 2 Table 2 shows the weighted averages between the male and female participants and mean GPA scores for the grades, A, B, C, D, E., and F.
Percentiles grade Percentile
5 10 25 50 75 90 95
Weighted Average (Definition 1) ethnicity A 1.2 2 2 3 4 4.6 5
B 1.65 2 3 4 4 4 5
C 1.8 2 2 3 4 5 5
D 1 2 1.5 3 4
F 3 1 3.75 4.5 5
Tukey's Hinges ethnicity A 3 2 3 4
B 3 4 4
C 2.5 3 4
D 2 3 4
F 4 4.5 5
Correalations Table 3
gender
gender Pearson Correlation 1 0.066 -0.194
Sig. (2-tailed) 0.504 0.048
N 105 105 105
ethnicity Pearson Correlation 0.066 1 0.11
Sig. (2-tailed) 0.504 0.265
N 105 105 105
gpa Pearson Correlation -0.194 0.11 1
Sig. (2-tailed) 0.048 0.265
N 105 105 105
Correlation is significant at the 0.05 level (2-tailed).
One-Sample Test
Test Value =4
t df Sig. (2-tailed) Mean Difference 95% Confidence Interval of the Difference
Lower Upper
gpa -16.383 104 0 -1.22114 -1.369 -2.4423