Question

Using the data in SLEEP75.RAW, we obtain the estimated equation

Sleep =3,840.83 -.163totwrk - 11.71educ - 8.70 age -.128 age2 + 87.75 male             

              (235.11)    (.018)              (5.86)        (11.21)          (.134)       (34.33)                      

N=706, R2=.123,

The variable sleep is  total  minutes  per week spent sleeping at night, totwrk is total weekly minutes spent working, educ  and  age  are  measured  in  years, and  male is a gender dummy.

1. All other factors being equal, is there evidence that men sleep more than women? How strong is

The evidence?

2. Is there a statistically significant tradeoff between working and sleeping? What is the estimated

Tradeoff?

3. What other regression do you need to run to test the null hypothesis that, holding other factors

Fixed, age has no effect on sleeping?

Answer 1