For a population of 100 low birth weight infants, a significant linear relations

Question

For a population of 100 low birth weight infants, a significant linear relationship was found to exist between systolic blood pressure (mmHg) and gestational age (weeks). Also in this dataset is the toxemia status of the mother. Toxemia is a potentially dangerous pregnancy complication characterized by high blood pressure. The variable toxemia is dichotomous (toxemia=1 if mother had toxemia; toxemia=0 if mother didn’t have toxemia).

Construct a 95% confidence interval for the slope for gestational age for model B. Show your work.

Linear Regression of Systolic Blood Pressure on Gestational Age and Other Predictors Modell Slope forEstimated Standard Error for Gestational Age Slope for Gestational Age Explanatory variable(s) R2 Included Gestational Age 0.436 0.481 1.264 0.079 0.081 B Gestational Age, Toxemia1.357

Explanation / Answer

here estimated slope b1=1.357

and std error sb1 =0.481

for (100-2=98) degree of freedom and 95% confidence interval ; criitcal value of t=1.9845

therfore 95% confidence interval for the slope for gestational age =b1 -/+ t*std error =0.4025 ; 2.3115

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