AP EAMCET · Maths · Statistics
If the mean of 100 observations is 50 and their standard deviation is 5 , then the sum of squares of all observations is
- A 50000
- B 250000
- C 252500
- D 255000
Answer & Solution
Correct Answer
(C) 252500
Step-by-step Solution
Detailed explanation
Given; \(\bar{x}=50\) \(n=100\) and \(S . D(\sigma)=5\) As, \(\bar{x}=\frac{\Sigma x_i}{n} \Rightarrow \Sigma x_i=n . \bar{x}=5000\). Also, S.D. is given by,…
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