The relationship between Median M, second quartile, the 5th Decile D5 and 50th percentile P50 of a set of observation is
P50 is the partial pressure of oxygen at which haemoglobin is 50% saturated. What will happen to theP50 value if there is an increase in the partial pressure of Carbon dioxide and what effect will it have on the oxygen affinity of haemoglobin (Hb)?