If the sum of ten values …
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Naveen Sharma 9 years, 1 month ago
Ans. \(\sum X = 100\)
\(N = 10\)
\(\overline X = {\sum X\over N} = {100\over 10} = 10\)
\(\sum X^2 = 1090\)
\(\sigma = {\sqrt{ {\sum X^2\over N } - ({\overline X})^2}}\)
\(\sigma = \sqrt { {1090\over 10} - (10)^2}\)
\(\sigma = \sqrt {109-100} = \sqrt 9 =3\)
\(CV = {\sigma \over \overline X} \times 100 = {3\over 10}\times 100 = 30\)
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