TS EAMCET · Maths · Statistics
The variance of observations is . If each observation is multiplied by and then is subtracted from it, then the variance of the new data is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(D)
Step-by-step Solution
Detailed explanation
Let the observations be x1, x2, x3,…,x50 and the mean be x¯.From the given data, Variance =7, the number of observations n=50. Variance =1n∑xi-x¯2 ⇒7=150∑xi-x¯2 ⇒350=∑xi-x¯2 ...1 Each observation is…
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