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You are asked to design a study to examine the relationship between preoperative B/P and postoperative...

You are asked to design a study to examine the relationship between preoperative B/P and postoperative hematocrit. What is the independent variable in this study?

Math   Statistics-And-Probability   
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Answer #1

Independent variable is preoperative B/P or blood pressure

preoperative blood pressure is independent variable because it is not dependent on the postoperative hematocrit value, but the postoperative hematocrit. is dependent on the preoperative blood pressure. Postoperative hematocrit can be changed based on the preoperative blood pressure and we can use the preoperative blood pressure data to find the regression equation that can predict the postoperative hematocrit.

Hence, independent variable is preoperative blood pressure and dependent variable is postoperative hematocrit.

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