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Assignment Task

Q. The data file birth weight contains a random UK sample of 1,089 women who recently gave birth. We are mainly interested in estimating the effect of usual number of cigarette consumption before pregnancy on the baby’s birth-weight. You may also use commands describe and summarize for a clear description of the available variables.
(a) Run an OLS regression of birth weight on cigs, income, male and parity. In the table provided below, write down the estimated coefficients together with their standard errors and the t-statistics.

Variables    Coefficients    Standard Errors    t-statistics
cigs            
income            
male            
parity            
(b) Interpret the estimated coefficient of variable cigs. Is this statistically significant?
(c) Interpret the estimated coefficient of variable income and its p-value.

(d) Predict the birth weight for a mother who used to smoke 10 cigarettes per day before pregnancy, has a family income of £20,000, hasn’t given any births in the past and the baby is female.

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