Solution: The variance of a dataset is defined as the average of the squared deviations from the mean. Given that there are 12 samples and the sum of the squares of the deviations is 144, we compute the variance as follows:

Mon, 04 May 2026 05:56:08 +0000

**Understanding Dataset Variance—Why It Matters for Real-World Data Insights** In an era where data fuels decisions across business,