Relationship between maximum mouth opening

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1. You are a nurse working in a facial injury clinic and you are interested in the relationship between maximum mouth opening and measurements of the lower jaw (mandible). You measured the dependent variable, maximum mouth opening (MMO, measured in mm), as well as predictor variables, mandibular length (ML, measured in mm) and angle of rotation of the mandible (RA, measured in degrees) of 35 patients. You have entered these data into an SPSS data file called MOUTH.sav, where y=MMO, x1=ML and x2 =RA. Answer the following questions using these data, and assume α=0.05.

a. Use SPSS to obtain the regression equation, where MMO is the dependent variable and ML and RA are the independent variables. What is the regression equation?

b. Use two different statistics provided in the SPSS output to describe the predictive utility (goodness) of the regression equation. Provide the practical interpretation of each of the chosen statistics.

c. What is the predicted MMO for a patient with ML = 96.45 and RA =40.12?

d. What is the predicted MMO for a patient with ML = 112.23 and RA = 22.30?

Reference no: EM131537675

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