1. Skin testing was done with an antigen from the bacterium Mycobacterium ulcerans in a 2000 study by Dobos et al.. The odds ratio for developing a skin reaction for subjects receiving burulin vs. subjects receiving controls is (to one decimal place):

Induration > 10 mm (positive skin reaction)	Agent
Burulin	Control
Yes	17	3
No	12	18

1. A hypothetical regression equation may be:

headcirc (cm) = 8.31 + 0.45 (gestational age - weeks) + 4.71 (birthweight - kg)

Predict the average head circumference a 30-week old birth weighing 1.1 kg (round to nearest whole number): ..cm Predict the average head circumference a 27-week old birth weighing 0.8 kg (round to nearest whole number): cm

If the birthweight of two babies is identical, predict the difference in head circumference if the gestational age differs by two weeks (to one decimal place)? .cm