Outliers happen. For example, you may have a test in one location that hits 15 seconds, but all your other test results are stable at 2 seconds. As a result of this outlier, your average gets bumped way out. Here's how to exclude these outliers from your results.
Note: This is a permanent action. You won't be able to recover deleted tests later.
You can delete individual tests in order to remove outliers.
1. Go to your Site dashboard, and click on the test point that you'd like to delete on your timeline, like this:
2. Click 'View Test' to open the test result page.
3. Scroll down to the bottom of the page, and click the 'Delete Test' link near the bottom right corner.
Again (because it bears mentioning twice): Once you've deleted a test, you can't recover it.