9) A group of 1,200 students from a college were surveyed, 304 of the 1200 students use eBooks and 431 of the 1200 students rent textbook i) What is the percentage in the sample who use eBook? (Round to nearest percent) a) 25.33% b) 25% () 26% c) 30.40% ii) What percent of students rent textbooks? (Round to 2 decimal places of a percent) a) 35% b) 43% () 35.92% d) 36% 10) In a college of 23,000 students, 1, 103 students were surveyed and 12% of the surveyed students rent textbook. i) What is the exact value of 12% of 1103? ii) What could be the actual number of students in the 1103 students who rent textbook? 11) A news station conducts a survey by asking viewers to call a toll-free number to response to this question "Do you favor a new federal tax on movie ticket cost?". 2000 viewers call in to give their opinion. i) Is the sample representative? Why? (Select one below.) a) The sample is representative because everyone can call-in. b) The sample is not representative because only viewers with strong opinion will call-in. This is a voluntary response sample. c) The sample is not representative because not everyone call-in. ii) Should the response be used to for conclusion about the whole population? (Select one below.) a) No, because the sample is not representative b) Yes, because the sample size is large enough. c) Yes, because the sample is representative. 12) The average late fee for a sample of 360 credit card holders was found to be $56.75. The 360 credit card holders are randomly selected from all 100 million US credit card holders i) is the sample representative of all 100 million US credit card holders? Why? (Select one below.) a) The sample is representative because the selection is through a random process. b) The sample is not representative because only 360 credit card holders are selected. c) The sample is not representative because not every credit card holders are selected. ii) Should the response be used to for conclusion about the whole population? (Select one below) a) No, because the sample size is not large enough so it is not representative. b) Yes, because the sample size is large enough. c) Yes, because the sample is representative