Author Question: A colleague generates a best-fit line through a set of data points and asks you to confirm its ... (Read 40 times)

berenicecastro · **on:** Jun 25, 2018

A colleague generates a best-fit line through a set of data points and asks you to confirm its usefulness and goodness-of-fit. You perform a root-mean-squared-error (RMSE) calculation and come up with a very small RMSE value.

Based on this value you determine that the best-fit line
A) deviates far from the data points.
B) fits the data well.
C) is useless for interpolation but valid for extrapolation.
D) predicts a value that is too far from the actual value.

Question 2

Using linear regression, you compare two different methods for quantifying LDL in a serum sample. Which of the following is NOT acceptable practice when using regression lines?

A) Calculation of the slope of the best fit line through the data points
B) Extrapolation of points outside the standard curve
C) Identification of the y-intercept using the slope of the standard curve
D) Interpolation of points within the range of the standard curve