Statistics Test...

The mean and standard deviation of a set of values are 5 and 2 respectively. If 5 is added to each value, then what is the coefficient of variation for the new set of values?

If Arithmetic mean and coefficient of variation of \(x\) are 10 and 40 respectively, then the variance of \(y=10-2 x\) is:

Find the mean of the given data:

3, 5, 8, 6, 9, 4, 5, 2, 7, 1, 5

If the mean of m observations out of n observations is n and the mean of remaining observations is m, then what is the mean of all n observations?

In which of the following case we will get coefficient of variation of 30%?

In formula Mean deviation \(= MD =\left(\frac{1}{n}\right)\sum| x - M |\) what does \(M\) indicates:

Mean of 100 observations is 50 and standard deviation is 10. If 5 is added to each observation, then what will be the new mean and new standard deviation respectively?

If the mean of 10 observations \(x_{1}, x_{2}, x_{3} \ldots x_{10}\) is 20 , then mean of \(x_{1}+2, x_{2}+4, x_{3}+\) \(6, \ldots x_{10}+20\) is:

In any discrete series (when all values are not same) if \(x\) represent mean deviation about mean and \(y\) represent standard deviation, then which one of the following is correct?