Question
(15) In a regression analysis of on-the-job head injuries of warehouse laborers caused by falling objects, Y is the measure of severity of the injury,
(15) In a regression analysis of on-the-job head injuries of warehouse laborers caused by falling objects, Y is the measure of severity of the injury, X1 is an index reflecting the weight of the object and the distance it fell, and X2 is a categorical variable for the type of head protection (X2=0 if hard hat, 1 if bump cap).
Start from a full model with interaction
Perform hypothesis test for the following questions. Use a significant level of 0.1.Define Ho/Ha, test statistic, critical value, and state conclusion.Several ANOVA tables are provided as below.
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