According to a recent study done by the Entertainment Software Association, 55% of all the people who play online games are female. If a sample of 15 online gamers is selected, how likely is it that
a. At least 7 of the gamers are female?
b. Between 8 and 11 (inclusive) of the gamers are female?
c. If you want to be 95% sure that the sample you select includes at least six females, what’s the minimum sample size that would be needed?
d. If you start to select a random sample one gamer at a time, how likely is it that you select your first female gamer on the fourth selection?

  • CreatedJuly 16, 2015
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