Exam 1

  1. Question

    For the 47 observations of the variable x in the data file boxhist.csv draw a histogram, a boxplot and a stripchart. Based on the graphics, answer the following questions or check the correct statements, respectively. (Comment: The tolerance for numeric answers is ±0.3\pm0.3, the true/false statements are either about correct or clearly wrong.)

    The distribution is unimodal: true / false
    The distribution is: symmetric / right-skewed / left-skewed
    The boxplot shows outliers: true / false
    A quarter of the observations is smaller than:
    A quarter of the observations is greater than:
    Half of the observations are greater than:


    Solution



    1. True. / False.
    2. False. / False. / True.
    3. True. / False.
    4. 2.54.
    5. 3.9.
    6. 3.72.