Video game Sales. The Chapter 1 Case Study looked at video game sales for the top 30 video games. The following table contains the total sales (in game units) and weeks on the top 30 list for a sample of five randomly selected video games. Use this information for Exercises 41 and 42.

Question 3.155

videogamereg

42. Calculate the following measures of spread for the number of weeks on the top 30 list:

  1. Range
  2. Sample variance
  3. Sample standard deviation
Video game Total sales in
millions of
units		 Weeks
on list
Super Mario Bros. U for WiiU 1.7 78
NBA 2K14 for PS4 0.6 27
Battlefield 4 for PS3 0.9 29
Titanfall for XBoxOne 1.2 10
Yoshi's New Island for 3DS 0.2 10
Table 3.55: Source: www.vgchartz.com.