Residents of Large Urban Cities Often Complain About the Lack

Multiple Choice

Residents of large urban cities often complain about the lack of parking and overpriced parking tickets.The mayor of Washington,DC,is doing a study to find out the 25% trimmed mean of all parking tickets received by residents in 1 year.A sample of 50 residents yielded a 25% trimmed mean of $150.00 and the bootstrap standard error is $23.00.A 95% bootstrap confidence interval will be accurate only if what condition is met?

A) The bias is small.
B) The bootstrap distribution is approximately Normal.
C) The bias is large.
D) A and B are both correct answers.