In an experiment with 15 observations, the results are as follows:∑x – InterviewSolution

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1.	In an experiment with 15 observations, the results are as follows:∑x2=2830, ∑x=170.One observation that was 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is
Answer» $I n a n e x p e r i m e n t w i t h 15 o b s e r v a t i o n s, t h e r e s u l t s a r e a s f o l l o w s : \sum x^{2} = 2830, \sum x = 170. O n e o b s e r v a t i o n t h a t w a s 20 w a s f o u n d t o b e w r o n g a n d w a s r e p l a c e d b y t h e c o r r e c t v a l u e 30. T h e n t h e c o r r e c t e d v a r i a n c e i s$

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