In a sample of 500 students from statistics courses in the fall semester, 312 earned a grade of C or higher. In the spring semester, 400 of the 525 students sampled earned a grade of C or higher. If we treat the fall semester as "sample 1" and the spring semester as "sample 2," what is the appropriate standardized test statistic to determine whether a smaller proportion of students passed in the fall? Group of answer choices z = -4.792 The z-test statistic depends on the level of significance of the test z = 6.699 z = 4.792 z = -6.699

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