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Online customer service is a key element to successful online retailing. According to a marketing survey,...

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. 7. The standard error of all possible sample proportions is ______. 8. What percent of the samples are likely to have between 35% and 40% who take advantage of online customer service. 9. What percent of the samples are likely to have less than 37.5% who take advantage of online customer service. 10. 95% of the samples proportions symmetrically around the population proportion will have between _____% and _____% of the customers who take advantage of online customer service.

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