The effect of dependence in a binary sequence on tests for a changepoint or a changed segment

The effect of partial dependence in a binary sequence on tests for the presence of a changepoint or changed segment are investigated and exemplified in the context of modelling non-coding deoxyribonucleic acid (DNA). For the levels of dependence that are commonly seen in such DNA, the null distributions of the test statistics are approximately correct and so conclusions based on them are still valid. A strong dependence would, however, invalidate the use of such procedures.