Joshua Aronson has spent considerable time studying “stereotype threat,” which refers to the fact that “members of stereotyped groups often feel extra pressure in situations where their behavior can confirm the negative reputation that their group lacks a valued ability.”

(Aronson, Lustina, Good, Keough, Steele, & Brown, 1998) This feeling of stereotype threat is then hypothesized to affect performance, generally lowering it from what it would have been had the participant not felt threatened. Aronson recruited two independent groups of white male college students for whom doing well in mathematics was personally important.

Both groups were asked to complete a difficult math test. The Threat group was also told that the researchers were studying why Asian students typically did better in math than non-Asian students. This condition should arouse feelings of stereotype threat for these white males. The mean for the Control group was 9.64 problems correct with For the Threat group the values were 6.58 and 3.03 respectively. There were 11 participants in the Control group and 12 in the Threat group. If these statistics correctly estimate population parameters, what is the power of this experiment?