Question 9.246

wiisales

50. Wii Game Sales. The following table represents the number of units sold in the United States for the week ending March 26, 2011, for a random sample of eight Wii games.11 The normality of the data was confirmed in the Section 8.1 exercises.

  1. Construct and interpret a 95% interval for the population mean number of units sold. (See Section 8.2.)
  2. Use your confidence interval to test, using level of significance , whether differs from the following values:
    1. 30,000 units
    2. 31,000 units
    3. 0 units
    4. 79,000 units
Game Units
(1000s)		 Game Units
(1000s)
Wii Sports Resort 65 Zumba Fitness 56
Super Mario All Stars 40 Wii Fit Plus 36
Just Dance 2 74 Michael Jackson 42
New Super Mario
Bros.		 16 Lego Star Wars 110