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CBSE Class 11-science Answered

Determine mean and standard deviation of first n terms of an A.P. whose first
term is a and common difference is d.
Asked by prakharagarwal1405 | 25 May, 2014, 04:15: PM
answered-by-expert Expert Answer
T h e space g i v e n space A P space b e a comma space a space plus space d comma space a space plus space 2 d comma space a space plus space 3 d space........... space a space plus open parentheses space n minus 1 close parentheses d space T h e space g e n e r a l space t e r m space i s space a subscript n equals a space plus space open parentheses n minus 1 close parentheses d M e a n space equals space mu space equals space fraction numerator a plus space a space plus space d plus space a space plus space 2 d space plus space a space plus space 3 d space........... space a space plus open parentheses space n minus 1 close parentheses d over denominator n end fraction S tandard space deviation space equals space square root of 1 over n sum from i equals 1 to n of open square brackets a subscript n space minus mu close square brackets squared end root
Answered by Avinash Soni | 27 May, 2014, 11:47: AM

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