Simple regression

1.

Preliminary data suggests that women living at higher altitudes tend to have smaller babies. To investigate, a sample of n=800 mother/infants from across the southwest (and living at different altitudes) was enrolled. The following focuses on the analysis of the association between altitude, measured in thousands of meters above sea level (variable name altkmeters, so altkmeters=1.2 corresponds to an altitude of 1,200 meters) and birth weight (variable name bweight, measured in grams). Some descriptive data from the study (n=800): Variable Mean St. Dev. Minimum Maximum altKmeters 0.62 0.53 0.00 1.99 4545 bweight 3245 414 2026