1_32

 

Interquartile Range

Interquartile Range = the score representing the 75th precentile minus the score at the 25th percentile

IOW: The Rane of the middle 50% of scores

= 84 – 70

=14


Semi-Interquartile Range = Interquartile Range divided by 2

= 14 / 2

= 7