I want to see if there is an association between hours of sleep and calories consumed per day. What statistical analysis would I use? A. Chi Square B. Pearson's R C. Spearman's rho D. Students T-test
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Use the data in SLEEP75 from Biddle and Hamermesh $(1990)$ to study whether there is a tradeoff between the time spent sleeping per week and the time spent in paid work. We could use either variable as the dependent variable. For concreteness, estimate the model $$sleep=\beta_{0}+\beta_{1} \text { totwrk }+u$$ where sleep is minutes spent sleeping at night per week and totwrk is total minutes worked dur- ing the week. $\begin{array}{l}{\text { (i) Report your results in equation form along with the number of observations and } R^{2} . \text { What does }} \\ {\text { the intercept in this equation mean? }}\end{array}$ $\begin{array}{l}{\text { (ii) If totwrk increases by } 2 \text { hours, by how much is sleep estimated to fall? Do you find this to be a }} \\ {\text { large effect? }}\end{array}$
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