Statistics
Variance
JEE Main PYQ
Grade 11
Question:
The variance of the data 2, 4, 6, 8, 10 equals _____.
Step-by-Step Solution
Key Concept: First compute the mean of the five values, then find $\frac{1}{5} \sum (x_i - \bar{x})^2$ by squaring each deviation from the mean and averaging.
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: 8