Recent research Into the cost of various medical procedures has shown the Impact of certain complications encountered in surgery on the total cost of a patient's stay in the hospital. The researchers used regression analysis and found the following results: Total cost for patient = Constant, plus ax Length of stay (measured In days), plus bx Presence of one or more complications (= 1 if true, o if false), plus cx Use of a laparoscope (= 1 If true, o if false) where a, b, care coefficients of the regression model. The laparoscope is an Instrument somewhat like a miniature telescope with a abdomen. It is about as big around as a fountain pen and twice as long. The research, based on 60 patients, showed the following regression results: R-squared: 52% Constant term: $3,630 Coefficients and t-values for Independent variables: Length of Stay $ 734 8.45 Coefficient t-value Complications $1,602 5.81 Laparoscope $ 948 2.47 Required: 1. What is the estimated cost for a patient whose surgery has complications and who stays in the hospital 5 days, and whose surgery requires a laparoscope? Estimated cost 2. Which, if any, dummy variables are used in this regression? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left with a question mark will be automatically graded as Incorrect.) Complications were present Length of stay (measured in days) Use of a laparoscope Recent research Into the cost of various medical procedures has shown the Impact of certain complications encountered in surgery on the total cost of a patient's stay in the hospital. The researchers used regression analysis and found the following results: Total cost for patient = Constant, plus ax Length of stay (measured In days), plus bx Presence of one or more complications (= 1 if true, o if false), plus cx Use of a laparoscope (= 1 If true, o if false) where a, b, care coefficients of the regression model. The laparoscope is an Instrument somewhat like a miniature telescope with a abdomen. It is about as big around as a fountain pen and twice as long. The research, based on 60 patients, showed the following regression results: R-squared: 52% Constant term: $3,630 Coefficients and t-values for Independent variables: Length of Stay $ 734 8.45 Coefficient t-value Complications $1,602 5.81 Laparoscope $ 948 2.47 Required: 1. What is the estimated cost for a patient whose surgery has complications and who stays in the hospital 5 days, and whose surgery requires a laparoscope? Estimated cost 2. Which, if any, dummy variables are used in this regression? (You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left with a question mark will be automatically graded as Incorrect.) Complications were present Length of stay (measured in days) Use of a laparoscope
