12.92 The Programme for International Student Assessment

(PISA) is the OECD’s testing tool employed for measuring the ability of 15-year-olds to use their reading, mathematics, and science knowledge and skills to tackle real-life challenges. In the earlier chapters, we investigated individual student data; we will now focus on country-wide average scores for boys and girls. Specifically, we are interested in the relationship between science knowledge as a response and mathematics and reading scores as predictors.

What is the better predictor? Using the data provided in PISA Sample, develop a multiple regression model explaining science knowledge with the help of mathematics and reading scores. Do this for boys and girls separately, and report your findings.