Nomographs for the Significance of the Difference Between Percentages

A Predictive Study of Voting Behavior Using Lampert's Pollimeter

“…Th us, using the attitudes toward the five political entities we attained a correct classification for 81 percent of the cases in respect to the actual vote among the respondents who stated their voting intention (i.e., 134 as previously mentioned), while only 47 percent were correctly classified among those who had not stated their voting intention (i.e., the remaining 32 subjects). Turning again to the critical omega nomograph invented by Reeb (1972), we found that the omega corresponding to the difference between 81 percent and 47 percent exceeds by far the critical minimum value of omega required for significance at p<.01 (i.e., w= .50 versus approximately w = .37, respectively). Now, if we combine the overriding accuracy of the actual vote prediction attai ned via voting intention with the above result showing voter attitudes, we can far better predict the actual vote in the presence of voting intention than in its absence.…”

“…This implies that respondents voted almost consistently with their voting intention (i.e., among the subjects investigated, an individual tended to vote for the political entity he expressed his/ her intent to vote for). The difference between 92 percent and 74 percent appears to be highly significant (p <.01) when tested, usin g the critical omega nomographs invented by Reeb (1972) (i.e., w = .34 versus w = .21, respectively).…”