Hence it is possible to find numbers − `` z '' and `` z '' , independent of '' μ '' , between which `` Z '' lies with probability 1 − α , a measure of how confident we want to be .
Hence it is possible to find numbers − `` z '' and `` z '' , independent of '' μ '' , where `` Z '' lies in between with probability 1 − α , a measure of how confident we want to be .