A random sample of 288 voters registered in the state of Cal

A random sample of 288 voters registered in the state of California showed that 141 voted in the last general election. A random sample of 216 registered voters in the state of Colorado showed that 125 voted in the most recent general election.

9. Which of the following is the correct condition that allows us to calculate the standard deviation?

a. There are at least 2880 registered voters in California and at least 2160 registered voters in Colorado.

b. 288(.49), 288(.51), 216(.58), and 216(.42) are all greater than 10.

c. 288(.53), 288(.47), 216(.53), and 216(.47) are all greater than 10.

d. There are at least 5040 registered voters in the U.S.

e. We cannot calculate a standard deviation since this problem involves proportions.

Solution

We cannot calculate a standard deviation since this problem involves proportions.