Calcium accretion rate (VO+) in grams per day is a standard measurement of the d
ID: 3224293 • Letter: C
Question
Calcium accretion rate (VO+) in grams per day is a standard measurement of the degree of bone formation. Measuring calcium accretion rate is extremely difficult and expensive in practice. It requires oral and intravenous administration of stable calcium isotopes, 25 blood samples over two weeks, and collection of all urine and fecal samples over those two weeks to measure how much of the calcium is retained. If a biomarker could be found in blood that would reliably predict the calcium accretion rate, it would make this measurement a lot more feasible and cost effective to conduct. Osteocalcin (OC) is one proposed biomarker and can be obtained from a single sample of blood. Our data set consists of data on 30 females aged 11-32 containing both OC and VO+ measurements.
A) Which variable is the response/dependent variable and which variable is the explanatory/independent variable? Why?
Explanation / Answer
As we are using OC as one of the biomaker which is used to reliably predict the calcium accretion rate, therefore the calcium accretion rate that is VO+ measuremements here is the response/dependent variable and the Osteocalcin (OC) that is the OC measurements is the explanatory/independent variable because we always used the independent variable measurements to predict the value of dependent variable.