I am running an A/B landing page test for the first time and wondering if the testing turns out to be about 50/50 on the two different test pages being displayed.

In initial testing, it seems to favor the page I first converted. Just trying to get a sense for what I can expect.

Thanks in advance!

The rule of thumb in statistics is to use a sample size of at least 30 - otherwise a lot of statistical methods aren't very reliable. However, this is fairly arbitrary. It's technical possible that with a sample size of 100 you could see 70/30. It's just very unlikely.