It has become common for shoppers to comparison shop using the Internet. In a survey, respondents who owned cell phones were asked whether they had, in the past 30 days, looked up the price of a product while they were in a store to see f they could get a better price somewhere else. The table below has responses grouped by income level. Complete parts a through c below. <$30K 216 $30K-$49.9K $50K-$74.9K >$75K 202 426 Yes 122 129 No 635 401 270 a) What percent of those earning less than $30K cyber comparison shop? What percent of those arning more than $75K do? About % of people eaming less than $30K cyber comparison shop. (Round to one decimal place as needed.) About % of people earning more than $75K cyber comparison shop. (Round to one decimal place as needed.) b) What percent of those who cyber comparison shop earn less than $30K? About % of those who cyber comparison shop earn less than $30K. (Round to one decimal place as needed.) c) Is it reasonable to assume that 28% of all shoppers use their phones to cyber comparison shop? Why or why not? O A. No, because the percent is significantly different from the percent in the sample. O B. Yes, because the sample is large enough that the sample can be assumed to be representative. O C. Yes, because the sample is representative of the population of all shoppers and the given value is very close to the sample value. O D. No, because the sample is probably not representative of the population of all shoppers. Next N MacBook Pro esc & * @ #3 $ %3D ! 9 4 5 7 1 P IT Q W tab G H K F * 00