In Establishing a Reference Interval, Data Are Plotted on Normal-Probability

Multiple Choice

In establishing a reference interval, data are plotted on normal-probability paper, and the resulting line curves away from linearity at the upper portion of the plot.What is the next step that should be taken in determining the reference interval?

A) Extrapolate values at the 2.5% and 97.5% levels, and determine the reference interval.
B) Replot data on log-probability paper to straighten the curvature.
C) Omit data associated with the curvature, and use the remaining data to determine the reference interval.
D) Begin the process over, since data cannot be used to determine the reference interval.