Direct mail advertisers send solicitations junk mail to thousands of potential customers in the hope that some will buy the company s product The response rate is usually quite low Suppose a company wants to test the response to a new flyer and sends it to 1170 people randomly selected from their mailing list of over 200 000 people They get orders from 142 of the recipients Use this information to complete parts a through di DE a Create a 90 confidence interval for the percentage of people the company contacts who may buy something Round to one decimal place as needed b Explain what this interval means Submit quiz OA The company is 90 confident that the probability a randomly sampled person will respond to the flyer falls within the confidence interval bounds OB The values for the interval bounds should be subtracted from 90 to obtain the company s true confidence level OC The company is 90 confident that the percentage of people who will respond to the flyer falls within the confidence interval bounds OD The company is 90 confident that the percentage of people who will not respond to the flyer falls within the confidence interval bounds c Explain what 90 confidence means OA About 90 of all random samples of size 1170 will produce intervals that contain the true proportion of people who will respond to the new flyer OB About 90 of all random samples will produce intervals that contain the true proportion of people who will respond to the new flyer OC About 90 of all randomly sampled people will respond to the new flyer O D About 90 of all random samples of size 1170 will produce intervals that do not contain the true proportion of people who will respond to the new flyer d The company must decide whether to do a mass mailing The mailing won t be cost effective unless it produces at least a 6 return What does your confidence interval suggest