You work for the consumer insights department of a major big-box retailer and you are investigating the efficacy of a new e-mail marketing campaign. Through the use of e-mail analytics research, you have determined that in a random sample of 937 monitored subscribers, 315 of them opened the e-mail within 24 hours of receiving it. What is the 90% confidence interval for the true proportion of all e-mail subscribers that opened the e-mail within 24 hours of receiving it? (3' 1) (0.63344 , 0.68921 ) '17} 2) (0.31079 , 0.36156 } if) 3) (0.3164, 0.35596) ('3' 4) (0.31079 , 0.36156 ) i 5) (0.32075 , 0.35161)