Answer:
[tex]{ \tt{interquartile \: range = \frac{1}{2} (q _{3} - q _{1} )}} \\ [/tex]
• q3 is upper quatile
[tex]{ \rm{q _{3} = \frac{3}{4} \times n}} \\ \\ { \rm{q _{3} = \frac{3}{4} \times 8 }} \\ \\ { \boxed{ \rm{q _{3} = 6 {}^{th} = 216 }}}[/tex]
[tex]{ \rm{q _{1} = \frac{1}{4} \times 8}} \\ \\ { \boxed{ \rm{q _{1} = 2 {}^{th} = 165}}}[/tex]
• n is number of terms:
→ therefore:
[tex]{ \tt{interquatile \: range = \frac{1}{2} (216 - 165)}} \\ \\ { \tt{interquartile \: range = 25.5}}[/tex]
