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The following model is a simplified version of the multiple regression model used by Biddle and...

The following model is a simplified version of the multiple regression model used by
Biddle and Hamermesh (1990) to study the tradeoff between time spent sleeping and
working and to look at other factors affecting sleep:
????? = ?? + ???????? + ?????? + ????? + ?
where sleep and totwrk (total work) are measured in minutes per week and educ and
age are measured in years.
(i) Before you go to the data, if we consider that adults trade off sleep for work, what
is the sign of ??? What signs do you think ?? and ?? will have?

Math   Statistics-And-Probability   
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