You Do It

  1. 53.

    1. Multimodal, with modes in the intervals 2–2.5 and 3–3.5.

    2. Roughly unimodal and right skewed.

    3. Yes; wide bins conceal the popularity of engines near 2 and 3 liters.

    4. y¯2.98liters, s ≈ 1.23 liters. y¯ lies at the center of the distribution; most engines are between y¯±2s liters in size.

    5. s/y¯0.41; engine sizes are more variable relative to the mean than for manufactured items like MMs.

    6. Very large or small engine.

  2. 55.

    1. A histogram and boxplot
    2. The large outlier is the song “Hey Jude,” which goes on for 7 minutes and uses 6.6 MB.

    3. Mean Median
      With “Hey Jude” 2.73 MB 2.47 MB
      Without 2.59 2.43
    4. Median

    5. Mean

  3. 57.

    1. Median = $220 million, mean = $2.24 ...

Get Statistics for Business: Decision Making and Analysis, 3rd Edition now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.