Statistics for Business: Decision Making and Analysis, 3rd Edition

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. $\overline{y}\approx 2.98\hspace{0.17em}\text{liters}$, s ≈ 1.23 liters. $\overline{y}$ lies at the center of the distribution; most engines are between $\overline{y}\pm 2s$ liters in size.

   5. $s/\overline{y}\approx 0.41$; engine sizes are more variable relative to the mean than for manufactured items like MMs.

   6. Very large or small engine.

2. 55.

   1. 

   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 ...