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What kind of sampling design was used

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Question: Computer use. A Gallup telephone poll of 1240 teens conducted in 2001 found that boys were more likely than girls to play computer games, by a margin of 77% to 65%. Equal numbers of boys and girls were surveyed.

a) What kind of sampling design was used?

b) Give a 95% confidence interval for the difference in game playing by gender.

c) Does your confidence interval suggest that among all teens a higher percentage of boys than girls play computer games?

Reference no: EM131650232

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