Question

Is this answer Correct and if not which one is with a simple Explanation? :)

Answer 1

SOLUTION:

Outliers are defined as about 1.5 times the interquartile range above the upper quarttile and below the lower quartile (Q1 - 1.5 IQR or Q3 + 1.5 IQR).

$\begin{gathered} \text{IQR = Q3 - Q1 = 65 - 50 = 15} \\ outlier=Q3+1.5(15) \\ =65+22.5=87.5 \end{gathered}$

Since John's score is 81 which is below 87.5, so John is not an outlier.