1. A researcher would like to compare the observed newborn weights (DBWT), measured in pounds, for the following three groups: (1) newborns whose mothers developed gestational diabetes but did not hav

2.  Gestational diabetes (RF_GDIAB) has long been associated with a higher probability of pre-term labor (birth before the 37th week, for which GESTREC3 can be used).  Discuss the observed proportions for this example.  Interpret the test of whether mothers with gestational diabetes are more likely to have a higher chance of delivery before the 37th week compared with those not having gestational diabetes.  Also interpret the odds ratio provided by SAS, as well as the relative risk of a pre-term birth.  [25 points]

SAS CODE:

Observed Proportions Interpretation for the Context of This Question (5 points):

Tests Interpretation (4 points): 

Odds Ratio Interpretation (4 points): 

Relative Risk Interpretation (4 points):

4.   A researcher hypothesizes that the proportion of WIC-using mothers (using WIC) who are smokers before pregnancy (using CIG_0) is less than 20%.  Write the hypotheses, and perform the appropriate test in SAS using only those reporting a pre-pregnancy smoking status.  Provide an interpretation of the results.  [15 points]

SAS CODE: