In hypothesis testing the alternative hypothesis, often written H1, is usually the thing you would like to show is true. For example, that your updated interface design is better than the old one.
Defined on page 61
Context: The language of hypothesis testing can be a little opaque. A core term, which you have probably seen, is the idea of the null hypothesis, also written H0, which is usually what you want to disprove. For example, H0 might be that your new software design has made no difference to error rates. In contrast, the alternative hypothesis, written H1, is what you typically would like to be true
Used on pages 61, 62, 64, 65, 105
Also known as H1