When computing m_D±t_(?/2) (s_(m_D )), what is s_(m_D)^2 if sample size is 16, and the variance of the difference scores is 256?

Identify the recommendation you would make to a school district that is trying to structure its high schools to improve cognitive development

Cut the length of subject's periods from 40 minutes to 25 minutes so that students do not have to pay attention for such a long time. Enlarge schools so that students have more opportunities to find a group of friends. Create more opportunities for students to be involved in school clubs and sports. Discourage teachers and students from talking about personal matters by separating teachers' lunchrooms, parking lots, and so on from those of students.

Discuss some of the cultural influences on mathematics performance as delineated in the text. Why is it important to have an understanding of cultural differences in math ability?

What will be an ideal response?