16. Statistics in Psychology

President Martin was crowing about the incoming class of first-year students at Brand X University. 'Last year the mean SAT score for first-year students was 1260,' he began, 'and this year it's risen to 1270! I think we can all be proud of that!' Although the scores from one year to the next are indeed different, why should no one get too excited?

When a result is called statistically significant, it means that:

The Psychology Department was having their annual talent show. Gilbert got up to sing his latest composition, 'I Got the P-Greater-Than-Point-O-5 Blues.' Why is this funny?

Consuelo wanted to compare the mean exam scores of a group of students that had studied 4 hours for the test, a second group that had studied 6 hours, and a third group that had studied for 8 hours. The appropriate statistic for Consuelo to use would be a(n) _________ .

The appropriate inferential statistic to use to compare frequencies of proportions between groups is: