Question

Some researchers study the tradeoff between time spent sleeping and working and look at other factors affecting sleep. The estimated equation is sleep_hat = 3,638.25 - .148 totwrk - 11.13 educ + 2.20 age where sleep and totwrk (total work) are measured in minutes per week and educ and age are measured in years. If someone works three more hours (i.e. 180 minutes) per week, by how many minutes is sleep predicted to fall?

a. 24.74

b. 26.64

c. 28.12

d.30.92

Answer 1

Answer: b. 26.64

The estimated equation is provided. Given that somebody works three more hours, their sleep is predicted to fall by 26.64 minutes.

We get this value as we multiply 180 by 0.148. For every minute worked the sleep is predicted to fall by 0.148 minutes. Therefore 180 minutes of work will lead to 26.64 minutes of less sleep.