from her purchased bags, rory counted 110 red candies out of 550 total candies. using a 90% confidence interval for the population proportion, what are the lower and upper limit of the interval? answer choices are rounded to the thousandths place. a.) lower limit: 0.166 upper limit: 0.241 b.) lower limit: 0.228 upper limit: 0.241 c.) lower limit: 0.166 upper limit: 0.172 d.) lower limit: 0.172 upper limit: 0.228