Mathematics

Ireland

22 November, 06:44

A video game company surveys a random sample of 250 gamers who report

annual income of $50,000. The company finds that the average gamer

spends $206 a year on games, with a standard deviation of $12.

Another company is also interested in the amount game consumers spend,

and surveys a random sample of 225 gamers with a verified yearly income of

$50,000. The company finds that the average gamer spends $250 a year on

games, with a standard deviation of $15.

Why is the second survey more believable than the first?

A. size of the sample for the second survey

B. size of the confidence interval for the second survey

C. likelihood of those in the first survey to lie about the amount they

make

D. lack of randomization in the first survey