regression of birthweights aainst the age of mothers. The Stata output for the r
ID: 3044968 • Letter: R
Question
regression of birthweights aainst the age of mothers. The Stata output for the regression and some Problem 2. Birthweight and age. (40 points, 5 points each) Based on data for a random sample of babies born in Pennsylvania in 1989, we run a summary statistics (with a few missing items) are given below: regress birthveight age, robust Nunber of obs F(1, 2998) Prob > F 3,000 18.05 Linear regreasion 0.0000 590.36 Root MSE birthweight ICoef. Std. Err tpolt! [95% Interval] Conf. . age cons 2.081379 4.25 0.000 4.76116 12.92331 3033.86 3256.489 56.771110.000o aunn birthveight age VariableI Obs Mean Std. Dev. Min birthweight I age I 3,000 3382.934 592.1629 26.889 5362487 3,000 125 5755 Birthveight is the birthweight of babies in the sample (in grams) and age is the age of the mother (in years). The population regression is given by: birthweight, = 0 + age, + th-Explanation / Answer
(f) In this regression model if age is given in terms of month rather in years the model will be written as follows:
Birth weight = 0 + 12 1 Age(Years).
This 12 1 is new regression coefficient in the model.
In this problem limits of 95% CI of 1 are used to obtain the same.
Therefore,
For new model it will (12 X 4.76116, 12 X 12.92331) = (57.13392, 155.0797)
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