The Sleep-Study dataset introduced in Data D.1 on page 599 contains many variables measuring different characteristics of the students in the study. One of these is a Happiness score that includes values from a minimum of 0 (very unhappy) to a maximum of 35 (extremely happy!). Find a reasonable regression model to predict Happiness based on some of the other variables available in the SleepStudy dataset. Describe the process you use to obtain your model and discuss the merits of your final choice.

Data D.1 on page 599

A recent study examines the relationship between class start times, sleep, circadian preference, alcohol use, academic performance, and other variables in college students. The data were obtained from a sample of students who did skills tests to measure cognitive function, completed a survey that asked many questions about attitudes and habits, and kept a sleep diary to record time and quality of sleep over a two-week period. Some data from this study are available in SleepStudy.