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Electronic vs. printed surveys. Refer to the Decision Line
Chapter 8, Problem 67E(choose chapter or problem)
Problem 67E
Electronic vs. printed surveys. Refer to the Decision Line (July 2001) study designed to compare the response rates of electronic surveys and traditional print surveys, Exercise 8.54 (p. 454). Recall that the two surveys were developed for customers who had purchased products over the Internet from a leading retailer of office supplies. How many customers should be sampled to estimate the difference between the response rates of the two survey types to within .01 using a 90% confidence interval? Assume the same number of customers should be sampled for each survey.
Questions & Answers
QUESTION:
Problem 67E
Electronic vs. printed surveys. Refer to the Decision Line (July 2001) study designed to compare the response rates of electronic surveys and traditional print surveys, Exercise 8.54 (p. 454). Recall that the two surveys were developed for customers who had purchased products over the Internet from a leading retailer of office supplies. How many customers should be sampled to estimate the difference between the response rates of the two survey types to within .01 using a 90% confidence interval? Assume the same number of customers should be sampled for each survey.
ANSWER:
Step 1 of 4
We are given the following information:
Number of customers who are mailed the printed survey = 63l
Number of useful responses out of mailed customers = 26l
Number of customers who were sent computer disc = 414
Number of useful responses out of customers sent with the computer disc = 155
The difference between the responses rates should be with in the 0.01, that is the margin
error (ME) is 0.01.
The confidence level is 95%.
The sample sizes are assumed to have equal sizes.
We need to estimate the number of customers that should be sampled from each survey.