Question

Mary's test grades were 78, 0, 85, 84, 84, and 88. Mary made up the missing test which changed her second test score from 0 to a 93. Which measure(s) of central tendency are affected by this change?

Answer 1

 0
  78
  84
    median = 84
  84
  85
  88


     78
     84
     84
       median = 84.5
     85
     88
     93

and now you can see that the median has also changed.
The mode remains the same.
Answer: mean and median