Copyright Malvin Porter, Jr. 2010 - acumen - The University of ...

Table 38
CBVS Test and Confidence Interval for the Proportion of Physical and the Proportion of
Relational Among Children who Selected Prosocial/Care Justification Choices
Sample ƒ n Sample p
Physical 115 316 0.363924
Relational 72 316 0.227848
Test of p = 0 vs. p ≠ 0
Difference = p (Physical) – p (Relational)
Estimate for difference: 0.136076
95% CI (0.0657001, 0.206452)
Test for difference = 0 (vs. ≠ 0): Z = 3.79 P-Value = 0.000
Fisher's exact test: P-Value = 0.000
N = 632
A test for the Difference in Proportions tested the following null hypothesis: There is no
difference between children’s CBVS Aggressive/Retribution Justification Choices for stories that
involved physical victimization and the proportion of children CBVS Aggressive/Retribution
Justification Choices for stories that involve relation victimization.
Of the 316 responses to the physical Story Form of Victimization scenarios, 34 were
Aggressive/Retribution Justification Choices (sample p = -0.0253165). Of the 316 responses to the
relational Story Form of Victimization scenarios, 42 were Aggressive/Retribution Justification
Choices (sample p = 0.132911). The estimate of the difference in the proportion of children’s
Aggressive/Retribution Justification Choice responses when the story involved physical
victimization and the proportion of children’s Aggressive/Retribution Justification Choice responses
when the story involved relational victimization was -0.0253165. The hypothesized difference in
proportion of zero does lie within the 95% CI (-0.0759942, 0.0253613). Therefore, zero is a
plausible value for the difference in proportions. Thus, I fail to reject the null hypothesis and I
conclude that there is not a significant difference in the proportions of children’s
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