Grace claims that the interquartile range of a data set is never equal to its range. which type of set can be used to prove or disprove her claim?
a. a set consisting of identical elements will prove her claim.
b. a set consisting of unequal elements will prove her claim.
c. a set consisting of identical elements will disprove her claim.
d. a set consisting of unequal elements will disprove her claim.