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5. Calculate the standard deviation and coefficient of variation

If

$n = 7$ ,

$\overline x = 9$ ,

$\sum x^2 = 771$ , then determine the standard deviation and the coefficient of variation.

Answer:

The standard deviation of the given data

$=$ . (Round off to

$3$ decimal places.)

The coefficient of variation of the given data

$=$

$\%$ . (Round off to

$1$ decimal place if necessary.)

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