1. Find the mean and variance for each of the data.
Mean () of the given data:
The respective values of the deviations from mean, are
-3, -2, 1 3 4 -5 -1 3
Hence, Mean = 9 and Variance = 9.25
CBSE Class 12 board exams 2025 to have 50% competency-based questions; no change in 10th
CBSE Class 12 board exams 2024 over; expected result date, trends of last 10 years
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