Data 2 Proportion Online customer service is a key element to successful online retailing. According to a marketing survey, 37.5% of online customers take advantage of the online customer service. Random samples of 200 customers are selected. 5. Referring to Data 2, the population mean of all possible sample proportions is 6. Referring to Data 2, the standard error of all possible sample proportions is 7. Referring to Data 2, % of the samples are likely to have between 35% and 40% who take advantage of online customer service. 8. Referring to Data 2, % of the samples are likely to have less than 37.5% who take advantage of online customer service. 9. Referring to Data 2, 90% of the samples proportions symmetrically around the population proportion % of the customers who take advantage of online will have between % and customer service. 10. Referring to Data 2, % of the samples are likely to have between 34% and 41% who take advantage of online customer service assuming the population is 1000