When constructing a confidence interval, the “margin of error” means that, if there is no bias,
a) every sample taken will come at least this close to the truth
b) about half of the samples taken will come at least this close to the truth
c) about 95% of all samples taken will come at least this close to the truth
d) the sampling method is biased-otherwise, the poll would always give the correct answer
e) there are serious non-sampling errors-otherwise, the poll would always give the correct answer





