Survey One

  1. The TOEFL scores for OIHS are given by the following data set:

    338, 343, 367, 370, 373, 383, 387, 390, 400, 403, 407, 420, 427, 440, 440, 443, 443, 443, 443, 450, 487, 490, 517
    1. Calculate the frequency using the classes (intervals) in the table below.  Include the class upper limit (CUL) in each class.
      Class Lower Limit Class Upper Limit Frequency Relative Frequency
      338 374
      _______________

      _______________
      375 410
      _______________

      _______________
      411 445
      _______________

      _______________
      446 481
      _______________

      _______________
      482 517
      _______________

      _______________

      Sum:


      _______________

      _______________
    2. Calculate the relative frequency for each interval (class) in the table above.

    3. Sketch a relative frequency histogram of the data, labeling your horizontal axis as appropriate.
      hrf5col_40.gif (2186 bytes)

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