These box plots show the number of electoral votes won by Democratic and Republican presidential candidates for the elections from 1984 through 2012

Republican

159

170

525

Democratic

299

3675

0

50

100

150

400

450

500

550

200 250 300 350

Electoral votes

Which statement best compares the spreads of the data sets?

A. find the power of the test, when the null hypothesis assumes a population mean of mu = 450, with a population standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence intervals of 95 b. find the power of the test, when the null hypothesis assumes a population mean of mu = 644, with a population standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence intervals of 95% c. find the power of the test, when the null hypothesis assumes a population mean of mu = 510, with a population standard deviation of 126, the sample size is 10 and the true mean is 529.44 with confidence intervals of 95