grade comparison

  1. I

    Exam Problem: calculating the overall distribution based on individual parts' distributions?

    Hi guys, hope you are enjoying the day! So I am having this problem where I have a population of people that participated in a national examination process (N=20,500). The examination required each student to take 4 different tests A, B, C and D and then they would be graded on a scale of...
  2. B

    Grade data - difference among graders

    Hi, I have 6 groups of grade data, scored by 6 different graders. I want to know if there are statistically significant differences between graders. Each score was earned by a different student. There were 72 students in all. I ran an ANOVA, but am not sure if that is the right approach...