# Standard Deviation

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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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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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- BE, Bangalore University, India
- MS, University of Wisconsin-Madison

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