MHT CET · Maths · Statistics
The variance and mean of 15 observations are respectively 6 and 10 . If each observation is increase by 8 then the new variance and new mean of resulting observations are respectively
- A 14,10
- B 14,18
- C 6,18
- D 6,10
Answer & Solution
Correct Answer
(C) 6,18
Step-by-step Solution
Detailed explanation
The new mean will be increased by 8
i.e., new mean becomes \(10+8=18\)
But, new variance will remain unchanged
Hence, new variance \(=6\)
i.e., new mean becomes \(10+8=18\)
But, new variance will remain unchanged
Hence, new variance \(=6\)
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