The authors of the paper Statistical Methods for Assessing Agreement Between Two Methods of Clinical Measurement(International Journal

Question:

The authors of the paper €œStatistical Methods for Assessing Agreement Between Two Methods of Clinical Measurement€(International Journal of Nursing Studies [ 2010]: 931€“ 936) compared two different instruments for measuring a person€™s ability to breathe out air. (This measurement is helpful in diagnosing various lung disorders.) The two instruments considered were a Wright peak flow meter and a mini Wright peak flow meter. Seventeen people participated in the study, and for each person air flow was measured once using the Wright meter and once using the mini Wright meter.

a. Suppose that the Wright meter is considered to provide a better measure of air flow, but the mini Wright meter is easier to transport and to use. If the two types of meters produce different readings but there is a strong relationship between the readings, it would be possible to use a reading from the mini Wright meter to predict the reading that the larger Wright meter would have given. Use the given data to find an equation to predict Wright meter reading using a reading from the mini Wright meter.
b. What would you predict for the Wright meter reading for a person whose mini Wright meter reading was 500?
c. What would you predict for the Wright meter reading for a person whose mini Wright meter reading was 300?