Academic Lineage and Student Performance in Medical School Page: 52
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calculated for both governing control groups. The null hypothesis states that no
difference exists between the two group proportions and was tested using the Z test for
differences between proportions (Champion, 1970, p. 136). The test statistic (Z) was
calculated at .4368741 and compared to the critical value of Z (Zo.05), which is 1.96.
Because the calculated value of Z did not exceed the critical value of Z at the .05 alpha
level, the null hypothesis was retained.
Table 33
Hypothesis 11: Governing Control Association with Failure Rate
Governing Total N Percent Valid N Percent Missing N Percent
Control Group (p) (q)
Public 533 100% 61 11.4% 472 88.6%
Private 400 100% 42 10.5% 358 89.5%
Table 34
Z Test Results for
Governing Control Groups and Failure Rate
Test Statistics Value
Z .4368741
Zo.os 1.96
Performance on the USMLE, Step 1
The data for the twelfth, and final, hypothesis of no association between
governing control, whether public or private, of students' institutions of origin and
student performance on the USMLE, Step 1, are presented in Tables 35 and 36. Mean
USMLE scores and the mean rank were calculated for both governing control groups as
part of the Mann-Whitney U test. The null hypothesis states that no difference exists
between the group mean ranks. The test statistic (Z) was computed at .439604, which did
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Wright, James Scott. Academic Lineage and Student Performance in Medical School, dissertation, August 1999; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc2206/m1/61/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .