If you change only one observation from a set of 10 observations, which of the following will definitely change?
- Mean
- Median
- Mode
- Standard deviation
my answer: i assumed that all 10 observations are equal then mean, median & mode will be equal and the standard deviation will be zero but when i change one observation, there will be probable change in all four quantities, but i am not sure which one will definitely change. please help me by explaining the answer.