A survey of a random sample of 48 students was conducted by a group of statistics students to investigate the relationshipbetween Sleep=average sleep time per night (in hours) and the following variables:
Study =average study time per day (in hours),
CoffeeCups =average number of cups of coffee consumed by a student per day,
and Extra = average number of extra-curricular activities per day
Female (1 =female, 0 = male)
Age=age in years
In the first part of their analysis the students run the simple linear regression of Sleep on Female
