• Exam_timeDownload .TXT file Open in Data Desk ?Link
  • Methods: Hypothesis Tests
  • Source: invented data
  • Number of Cases: 20
  • Story:

    The instructor of a large math
    class estimates that at the intended
    level of difficulty, his undergraduate midterm
    exams require on average 10 minutes for
    graduate students in his department to
    complete. If the average is longer than 10
    minutes, then the exam is likely too hard and
    needs to be revised. As usual, the
    professor gathers his 20 teaching assistants in
    a room to have them test out the exam. The dataset holds the times it took the grad students to complete the exam.


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