題組內容

2. Data were collected on 39 seventh-grade students in a Midwest school to determine what factors are related to their academic performance score (AP score). The explanatory variables are IQ (score on an IQ test), SC (overall score on the Piers-Harris Children's Self-Concept Scale), and SEX (1 for male and 0 for female). A multiple regression is conducted and the results are as follows:

c. (5%) With confidence coefficient .95, how does AP score change for one unit increases in IQ score while holding SC score and SEX constant?