問題文
A charity runs an A/B test on a fundraising email with a test share of 30 percent. A trustee worries that supporters will be annoyed by receiving two versions of the same message. What actually happens to each supporter?
選択肢
- Each supporter receives one email, because the whole audience gets version A first and then gets version B a day later.
- Each supporter receives two emails, because the tested share gets version A and version B while the remainder gets the winning version.
- Each supporter receives one email, because the tested share gets version A or version B while the remainder gets the winning version.
- Each supporter receives one email, because the tested share gets the winning version while the remainder gets either version A or version B.