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Standard Deviation

61. According to Forrester Research Inc., approximately 19% of Internet users play games online. The following data show the number of unique users(in thousands) for the month of March for 10 game sites(The Wall Street Journal, April 17, 2000).

Site -Unique User
AOLGames.aol -9416
Extremelotto.com -3955
Freelotto.com -12901
Gamesvill.com -4844
Iwin.com -7410
Prizecentral.com -4899
Shockwave.com -5582
Speedyclick.com -6628
Uproar.com -8821
Webstakes.com -7499

Using these data compute the mean, median, variance, and standard deviation.

Solution Summary

61. According to Forrester Research Inc., approximately 19% of Internet users play games online. The following data show the number of unique users(in thousands) for the month of March for 10 game sites(The Wall Street Journal, April 17, 2000).

Site -Unique User
AOLGames.aol -9416
Extremelotto.com -3955
Freelotto.com -12901
Gamesvill.com -4844
Iwin.com -7410
Prizecentral.com -4899
Shockwave.com -5582
Speedyclick.com -6628
Uproar.com -8821
Webstakes.com -7499

Using these data compute the mean, median, variance, and standard deviation.

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