A small business owner has two coupon codes for a new item: A and B. The past customers were all emailed a coupon code for one of these two promotions (either A or B, and which customer received which promotion was chosen at random). What method should the business owner use to determine if there is a statistically significant difference in the proportion of customers who will purchase the new item when comparing coupon A vs. coupon B? Question 13 options: Independent t-test. Paired t-test. Neither of the above