A hospital would like to develop a regression model to predict the total hospital bill for a patient based on the age of the patient (x1), his or her length of stay (x2), and the number of days in the hospital's intensive care unit(ICU) (x3). Data for these variables can be found below. Complete parts a through e below.
a) Construct a regression model using all three independent variables. (Round to the nearest whole number as needed.)
b) Interpret the meaning of the regression coefficients.
c) Predict the average hospital bill for a 69-year-old person hospitalized for ten days with no days spent in the ICU. (Round to the nearest dollar as needed.)
d) Construct a 95% confidence interval for the average hospital bill for the patient described in part c. (Round to the nearest dollar as needed.)
e) Construct a95% prediction interval for the average hospital bill for the patient described in part c, that is, a 69-year-old person hospitalized for ten days with no days spent in the ICU. (Round to the nearest dollar as needed.)
Below is the excel table given.
Thank you!! (:
ANSWER:
For the given data
The Excel output is:
a)
y = 6043 + 8*x1 + 1147*x2 + 673*x3
b)
For every additional age of a patient, the bill will increase by 8.
For every additional length of stay of a patient, the bill will increase by 1147.
For every additional length of stay in ICU of a patient, the bill will increase by 673.
c)
y = 18060
d)
The 95% confidence interval is between $11636 and $24485.
e)
The 95% prediction interval is between $296 and $35824.
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