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  3. 1. online customer service is a key element to suc

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

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Statistics

1. Online customer service is a key element to successful onlineretailing. According to a marketing survey, 6.8% of onlinecustomers take advantage of the online customer service. Randomsamples of 210 customers are selected. What is the standard errorof all possible sample proportions?

2. A researcher wants to create a 90% confidence interval forthe population proportion, with the margin of error of 4%. She hasno idea what the population proportion is and she cannot take atrial sample. Calculate the required sample size.

Answer & Explanation Solved by verified expert
4.3 Ratings (697 Votes)
SolutionGiven that1 p 00681 p 1 0068 0932n 210    See Answer
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