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

A. To reduce the variability of the estimate

Step-by-step explanation:

The larger the sample, the less variability there is.

The smaller the sample, the more variability there is.

Bias has to do with how randomly the sample is selected.  Assuming that method doesn't change, the bias doesn't change.

answer: idk

step-by-step explanation:

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!