What does a standard deviation of 0 indicate about a data set?
- A. All values in the data set are identical ✓
- B. The data set has no values
- C. The data set is normally distributed
- D. The mean is equal to zero
Correct answer
A. All values in the data set are identical
Explanation
A standard deviation of 0 means there is no variability in the data — every value is exactly the same as the mean.