when is the dip test valid for an unimodal distribution why use hartigans test why use hartigan's dip test? what is its purpose and why is it useful? which statistic would you use to reject the hypothesis of unimodality for the distribution that is bimodal? how is the dip test valid why use a dip test to reject null hypothesis can you reject the null hypothesis for a distribution that is unimodal why is it valid to use hartigans dip test what makes a dip test valid for unimodal why does hartigans dip test for unimodality which is not a null hypothesis when is the test statistic used to reject the unimodal hypothesis? what is the dip test what does a dip test for why is it useful to use the hartigan test for a null hypothesis? which is the strongest statistical test to reject the unimodal hypothesis? why are dip tests valid for unimodality which test is valid to test for null hypothesis when is the hartigans test valid why use hartigans dip test