How does gender influence
Conduct a test of hypothesis
to determine if there is a difference on average for total costs between
males and females?
Create a multiple regression
that predicts total costs from gender and length of stay. When a
nominal variable with two levels is included in a multiple regression
two parallel lines are estimated, one for each level. The regression
coefficient for the nominal variable represents ½ of the distance
between the two lines or one half of the effect of gender on total
Compare the difference
in the gender mean total costs found in part a with the gender effect
(twice the gender regression coefficient) in part b. Why do they
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