Statistics
Variance
Premium Question
Grade 11
Question:
The variance of the five observations 4, 4, 4, 4, 4 is:
Step-by-Step Solution
Key Concept: Notice that every observation is identical to the mean — think about what this means for each individual deviation $x_i - \bar{x}$, and hence for the variance.
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: (1)