Computing p-values for t tests 2 An alternative to the classical approach is to ask, what is the smallest significance level at which the null would be rejected? A So, compute the t statistic, and then look up what percentile it is in the appropriate t distribution-this is the p-value o p-value is the probability we would observe the t statistic we did if the null were true Economics 20- Prof andersonEconomics 20 - Prof. Anderson 17 Computing p-values for t tests An alternative to the classical approach is to ask, “what is the smallest significance level at which the null would be rejected?” So, compute the t statistic, and then look up what percentile it is in the appropriate t distribution – this is the p-value p-value is the probability we would observe the t statistic we did, if the null were true