4 Data exploration
4.7 Answers

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    1. This is a continuous variable.
    2. This is a discrete variable.
    3. This is a discrete variable.
    4. This is a continuous variable.
    5. The exact age is a continuous variable, but age is often rounded down to the closest integer. In this case, it would be a discrete variable.
    6. This is a discrete variable.
    7. This is a continuous variable.
    8. This is a continuous variable.
    9. This is a continuous variable.
    10. This is a discrete variable.
    Return to question 1
    1. 
      Table 4.7.1
      Answer for 2a
      Table summary
      This table displays the results of Answer for 2a. The information is grouped by Number of customers (x) (appearing as row headers), Frequency (f) (appearing as column headers).
      Number of customers (x) Frequency (f)
      20 2
      21 7
      22 4
      23 3
      24 5
      25 2
      26 2
      Total 25
    2. The observation that occurs the most frequently is 21.
    3. 
      Table 4.7.2
      Answer for 2c
      Table summary
      This table displays the results of Answer for 2c. The information is grouped by Number of customers (x) (appearing as row headers), Frequency (f), Relative frequency and Percentage frequency (appearing as column headers).
      Number of customers (x) Frequency (f) Relative frequency Percentage frequency
      20 2 0.08 8
      21 7 0.28 28
      22 4 0.16 16
      23 3 0.12 12
      24 5 0.20 20
      25 2 0.08 8
      26 2 0.08 8
      Total 25 1.00 100
    Return to question 2
    1. Answer:
      
      Table 4.7.3
      Answer for 3a
      Table summary
      This table displays the results of Answer for 3a. The information is grouped by Score (x) (appearing as row headers), Frequency (f) (appearing as column headers).
      Score (x) Frequency (f)
      1 2
      2 3
      3 4
      4 4
      5 4
      6 2
      7 10
      8 3
      9 6
      10 2
      Total 40
    2. mean = 5.9, median = 7, mode = 7
    3. The median is higher than the mean because most of the observations have high values. The mean is influenced by the lower scores. The mode is equal to the median.
    Return to question 3
    1. 113
    2. 78
    3. 153, 182, 226.5, 260, 266

    4. Chart 4.7.1 Box and whisker plot for the hypothetical number of new hires

      Data table for Chart 4.7.1 
      Data table for chart 4.7.1
      Table summary
      This table displays the results of Data table for chart 4.7.1. The information is grouped by Measurement (appearing as row headers), Value (appearing as column headers).
      Measurement Value
      Minimum 153
      Lower quartile (Q1) 182
      Median (Q2) 226.5
      Upper quartile (Q3) 260
      Maximum 266
    Return to question 4


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