Apolling company has decided to increase the size of its random sample of voters from about 1,000 people to about 2,800 people right before an election. a poll was designed to estimate the proportion of voters who favor a new law banning cell phone use in internet coffee shops. what is the effect of this increase?

a. to reduce the variability of the estimate
b. to increase the variability to the estimate
c. to reduce the bias of the estimate
d. to increase the bias of the estimate
e. this increase will have no effect because the population size is the same